View SI-8008HFE_4573726.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

SI-8008HFE DC-to-DC Step-Down Converter
Features and Benefits
5.5 A output current supplied in a small, through-hole mount power package High efficiency: 83% at VIN = 15 V, IO = 3.0 A,VO = 5 V Requires only seven external components (optional soft start requires an additional capacitor) Oscillation circuit built-in (frequency 150 kHz typical) Constant-current mode overcurrent protection circuit and overtemperature protection circuit built-in Soft start function built-in (can be implemented as an on/off function; output-off state at low level) Low current consumption during output-off state
Description
The SI-8008HFE DC voltage regulator is a DC-to-DC buck convertor that attains an oscillation frequency of 150 kHz, and has an integrated miniaturized choke coil, allowing it to serve as a small, high efficiency power supply in a compact TO220F package. The internal switching regulator function provides high efficiency switching regulation without any need for adjustment. The device requires only six external support components. The optional soft start function requires an additional capacitor. Optional on/off control can be performed using a transistor. The SI-8008HFE includes overcurrent and overtemperature protection circuits. Applications include: DVD recorder FPD TV Telecommunications equipment Office automation equipment, such as printers On-board local power supply Output voltage regulator for second stage of SMPS (switched mode power supply)
Package: TO220F-5
Not to scale
Functional Block Diagram
VIN 1 IN PReg Overcurrent Protection SW 2 L1 Di FMB-G16L (Sanken) Latch and Driver VOU C2
C1
C4
Reset 5 SS On/Off Soft Start Osc Comparator C3 Error Amplifier
R1
Overtemperature Protection
ADJ
4
R2 Reference Voltage
GND 3
27469.060-I
SI-8008HFE
Selection Guide
Part Number SI-8008HFE Output Voltage Adjustable Range (V) 0.8 to 24 Efficiency, Typ. (%) 83
DC-to-DC Step-Down Converter
Input Voltage, Max. (V) 40 Output Current, Max. (A) 5.5
Packing 50 pieces per tube
Absolute Maximum Ratings
Characteristic DC Input Voltage Symbol VIN PD1-1 Power Dissipation PD1-2 PD2-1 PD2-2 Junction Temperature Storage Temperature Thermal Resistance (junction-to-case) Thermal Resistance (junction-to-ambient air) TJ Tstg RJC RJA Connected to infinite heatsink; TJ(max) = 150C, limited by internal overtemperature protection. Connected to infinite heatsink; TJ = 125C. No heatsink; TJ(max) = 150C, limited by internal overtemperature protection. No heatsink; TJ = 125C. Internal overtemperature protection circuit may enable when TJ 130C. During product operation, recommended TJ 125C. Remarks Rating 43 25 20 2.15 1.72 -40 to 150 -40 to 150 5 58 Units V W W W W C C C/W C/W
Recommended Operating Conditions*
Characteristic DC Input Voltage Range DC Output Voltage Range DC Output Current Range Operating Junction Temperature Range Operating Temperature Range Symbol VIN VO IO TJOP TOP To be used within the allowable package power dissipation characteristics (refer to Power Dissipation chart). VIN VO + 3 V; to be used within the allowable package power dissipation characteristics (refer to Power Dissipation chart). Remarks VIN (min) is the greater of 4.5 V or VO+3 V; for VIN in the range VO+2 V to VO+3 V, IO 3 A. Min. See remarks 0.8 0 -30 -30 Max. 40 24 5.5 125 85 Units V V A C C
*Required for normal device functioning according to Electrical Characteristics table.
All performance characteristics given are typical values for circuit or system baseline design only and are at the nominal operating voltage and an ambient temperature, TA, of 25C, unless otherwise stated.
Sanken Electric Co., Ltd. 3-6-3 Kitano, Niiza-shi, Saitama-ken 352-8666, Japan Phone:+81-48-472-1111 http://www.sanken-ele.co.jp
2
SI-8008HFE
DC-to-DC Step-Down Converter
ELECTRICAL CHARACTERISTICS1, valid at TA = 25C, VO = 5 V (adjusted), R1 = 4.2 k, R1 = 0.8 k
Characteristic Reference Voltage Reference Voltage Temperature Coefficient Efficiency2 Operating Frequency Line Regulation Load Regulation Overcurrent Protection Threshold Current SS Terminal On/Off Operation Threshold Voltage SS Terminal On/Off Operation Outflow Current Quiescent Current 1 Quiescent Current 2
1Using
Symbol VADJ VADJ /T fO VLine VLoad IS VSSL ISSL Iq Iq(off) VSSL = 0 V
Test Conditions VIN = 15 V, IO = 1 A VIN = 15 V, IO = 1 A, TC = 0 to 100 C VIN = 15 V, IO = 3 A VIN = 15 V, IO = 3 A VIN = 10 to 30 V, IO = 3 A VIN = 15 V, IO = 0.2 to 5.5 A VIN = 15 V
Min. 0.784 - - - - - 5.6 - - - -
Typ. 0.800 0.1 83 150 60 20 6.5 - 10 6 200
Max. 0.816 - - - 80 50 7.5 0.5 30 - 400
Units V mV/C % kHz mV mV A V A mA A
VIN = 15 V, IO = 0 A VIN = 15 V, VSS = 0 V
circuit shown in Typical Application Circuit diagram. 2Efficiency is calculated as: (%) = ([V x I ] x [V x I ]) x 100. O O IN IN
Pin-out Diagram
Terminal List Table
Name IN SW GND ADJ Number 1 2 3 4 Supply voltage Regulated supply output Ground terminal Terminal for resistor bridge feedback The SS terminal is used to enable soft start and to control on/off operation of the IC output, VO (see figure 2). If neither soft start nor on/off control is used, leave pin open. To enable soft start, connect a capacitor between SS and ground. To control on/off operation, connect an NPN bipolar transistor, in a TTL open collector output configuration, between the SS terminal and GND. Turn off is done by decreasing VSSL below its rated level. When both soft start and VO on/off are used, a protection measure such as current limiting is required because, if the capacitance of C3 large, the discharge current of C3 flows across the transistor for on/off operation. Because a pull-up type resistor is provided inside the IC, no external voltage can be applied. Function
SS
5
123 45
SI-8008HFE
SS 5
SI-8008HFE
SS 5
SI-8008HFE
SS 5
System TTL
C3
System TTL
C3
(a) VO on/off control only
(b) Soft start only
(c) VO on/off and soft start control
Figure 2. Alternative configurations for SS pin. If neither soft start nor VO on/off is required, the SS pin is left open.
Sanken Electric Co., Ltd. 3-6-3 Kitano, Niiza-shi, Saitama-ken 352-8666, Japan Phone:+81-48-472-1111 http://www.sanken-ele.co.jp
3
SI-8008HFE
DC-to-DC Step-Down Converter
Performance Characteristics
at TA = 25C, VO = 5 V adjusted, , R1 = 4.2 k, R2 = 0.8 k
90
8V
15 V
5.06 5.04
VIN 40 V
80
30 V
(%)
5.02
40 V
60
VIN
VO (V)
Efficiency versus Output Current
70
Load Regulation: 5.00 Output Voltage versus 4.98 Output Current
4.96
30 V 20 V 10 V
50
8V
4.94 4.92
40
0
1
2
3
4
5
6
0
1
2
IO (A) 6.00
0A
3 IO (A)
4
5
6
6
1A 2A
5.00
5
3A 4A 5.5 A 8V
Low Voltage Behavior: Output Voltage versus Supply Voltage
4.00 VO (V) 3.00 2.00
Overcurrent Protection: Output Voltage versus Output Current
IO
4
VO (V)
VIN
3 2 1 0
10 V 15 V 20 V 30 V 40 V
1.00 0
0
1
2
3
4 5 VIN (V)
6
7
8
0
2
4 IO (A)
6
8
Sanken Electric Co., Ltd. 3-6-3 Kitano, Niiza-shi, Saitama-ken 352-8666, Japan Phone:+81-48-472-1111 http://www.sanken-ele.co.jp
4
SI-8008HFE
DC-to-DC Step-Down Converter
Thermal Performance Characteristics
The application must be designed to ensure that the TJ(max) of the device is not exceeded during operation. To do so, it is necessary to determine values for maximum power dissipation, PD(max), and ambient temperature, TA(max). PD can be calculated from input values:
Power Dissipation versus Ambient Temperature
Shin Etsu G746 silicon grease
28 26
Infinite heat sink TJ(max) = 150C
100 V - 1 - VF I O 1 - O PD = VO I O V IN x
where: VO is output voltage in V, VIN is input supply voltage in V, IO is output current in A,

24 22 20 18 16 PD (W) 14 12 10 8 6 4 2 0 -40
Infinite heat sink TJ(max) = 125C
Al heat sink 200 mm x 200 mm x 2 mm RJA = 2.3C/W TJ(max) = 125C Al heat sink 100 mm x 100 mm x 2 mm RJA = 5.2C/W TJ(max) = 125C
x is IC efficiency in percent (varies with VIN and IO; refer to efficiency performance curves for value), and VF is forward voltage for the input diode, Di. In these tests, the Sanken FMB G16L was used, at 0.55 V and IO = 5.5 A. For application design, obtain thermal data from the datasheet for the diode. PD is substantially affected by the heat conductance properties of the application, in particular any heatsink connected to the device radiation fin. The relationships of PD, TA, and heatsink type is represented in the Power Dissipation chart. Because the heat dissipation capacity of the heatsink depends substantively on how it is used in the actual application, thermal characteristics of the application must be confirmed by testing. The internal overtemperature protection circuit may enable when TJ 130C.
Al heat sink 75 mm x 75 mm x 2 mm RJA = 7.6C/W TJ(max) = 125C No heat sink TJ(max) = 150C No heat sink TJ(max) = 125C
-20
0
20 TA (C)
40
60
80
6
OTP On
5
Overtemperature Protection: Output Voltage versus Junction Temperature
VIN = 15 V, IO = 10 mA
4 VO (V) 3 2 1
OTP Off
0 0 20 40 60 80 100 TJ (C) 120 140 160 180
Sanken Electric Co., Ltd. 3-6-3 Kitano, Niiza-shi, Saitama-ken 352-8666, Japan Phone:+81-48-472-1111 http://www.sanken-ele.co.jp
5
SI-8008HFE
DC-to-DC Step-Down Converter
Component Selection
Diode Di A Schottky-barrier diode must be used for Di. If other diode types are used, such as fast recovery diodes, the IC may be destroyed because of the reverse voltage applied by the recovery voltage or ON voltage. Choke Coil L1 If the winding resistance of the choke coil is too high, the efficiency may be reduced below rating. Because the overcurrent protection start current is approximately 6.5 A, attention must be paid to the heating of the choke coil by magnetic saturation due to overload or short-circuited load. Capacitors C1, C2, C3, and C4 Because for SMPS, large ripple currents flow across C1 and C2, capacitors with high frequency and low impedance must be used. If the impedance of C2 is too high, the switching waveform may not be normal at low temperatures. Do not use either OS or tantalum types of capaci-
tors for C2, because those cause an abnormal oscillation. The device is stabilized, and for proper operation, C1 and C4 must be located close to the device (see layout diagram, below). C3 is required only if the soft start function is used. If not using soft start, leave the SS terminal open. A pull-up resistor is provided inside the IC. Resistor Bridge R1 and R2 comprise the resistor bridge for the output voltage, VO, and are calculated as follows: (V - V ) (V - 0.8) () , and R2 = VADJ = 0.8 = 0.8 (k ) R1 = O ADJ = O -3 -3
IADJ 1 x 10 IADJ 1 x 10
IADJ should always be set to 1 mA. Note that R2 should always be present to ensure stable operation, even if VO, is set to 0.8 V (that is, even if there is no R1). VO should be at least VIN + 8%.
Typical Application Diagram
L1 1 IN SW SI-8008HFE ADJ C1 C4 SS GND 3 5 C3 Soft Start Only 4 Di R1 IADJ R2 C2 GND 2
VIN
VO
Component C1 C2 C3 C4 Di L1
Rating 1500 F 1000 F 0.1 F (For soft start function) 4.7 F (RPER11H475K5) FMB-G16L (Sanken) 100 H
GND
Recommended PCB Layout
GND GND U1 C1 C4 C2 C3 S1
C1 Vin C4 U1 R2 D1 D1 Vin Vsw L1 Vsw R2 L1 R1
C2 R1 C3
S1
Vadj/Vos Vout Vadj/Vos Vout
All external components should be mounted as close as possible to the SI-8008HFE. The ground of all components should be connected at one point.
Sanken Electric Co., Ltd. 3-6-3 Kitano, Niiza-shi, Saitama-ken 352-8666, Japan Phone:+81-48-472-1111 http://www.sanken-ele.co.jp
6
SI-8008HFE
DC-to-DC Step-Down Converter
PACKAGE OUTLINE DRAWING
4.70.2 10.16 0. 2 2.54 0.2
3. 3 0. 1
7
0.7
XXXXXXXX XXXXXXXX XXXXXXXX
3.
2
0.
2
15. 87 0. 2
6. 68 0. 2
5. 4
Branding
XXXXXXXX
(4-R1)
0.8 0.6
+0.1 -0.05
R-end
( 2)
4 x 1.70.6 = (6.8)
0.5 -0.1
+0.2
4.3 0.7
8.2 0.7
Branding codes (exact appearance at manufacturer discretion): Leadform: 1113A Weight: 2.3 g typical Dimensions in millimeters
1st line, type: 8008HFE 2nd line, lot: SK YMW Where: Y is the last digit of the year of manufacture M is the month (1 to 9, O, N, D) W is the week of the month (1 to 5) 3rd line, tracking number: nnnn
RoHS directive compliant Device pins lead (Pb) free
4. 3 0. 6
( 17. 9)
2.76 0.2
Sanken Electric Co., Ltd. 3-6-3 Kitano, Niiza-shi, Saitama-ken 352-8666, Japan Phone:+81-48-472-1111 http://www.sanken-ele.co.jp
7
SI-8008HFE
DC-to-DC Step-Down Converter
PACKING SPECIFICATION
0.7
7 8
528
A 1.2 1.5
14.0 10.6
ANTISTATIC 12.6
A View A-A 3.9 5.5 14.4 1.8
Tube 50 pieces per tube
5.0
View A-A Enlargement
50 155
570
5.2
12.0
H
Inner Carton 12 tubes per carton 600 pieces per inner carton
L
Dimensions in mm
W
Outer Carton (See table)
Carton Type Outer Carton A Outer Carton B
L 580 580
W 180 335
H 140 140
Quantity 2 inner cartons, 1200 pieces per outer carton 4 inner cartons, 2400 pieces per outer carton
34.0
Sanken Electric Co., Ltd. 3-6-3 Kitano, Niiza-shi, Saitama-ken 352-8666, Japan Phone:+81-48-472-1111 http://www.sanken-ele.co.jp
8
SI-8008HFE
DC-to-DC Step-Down Converter
WARNING -- These devices are designed to be operated at lethal voltages and energy levels. Circuit designs that embody these components must conform with applicable safety requirements. Precautions must be taken to prevent accidental contact with power-line potentials. Do not connect grounded test equipment. The use of an isolation transformer is recommended during circuit development and breadboarding.
Cautions for Use * Operation of the product in parallel to increase current is not permitted. * Although the product has an internal overtemperature protection circuit, that is intended only to protect the product from temporary excess heating due to overloads. Long-term reliability cannot be guaranteed when the product is operated under continuous overload conditions. Because reliability can be affected adversely by improper storage environments and handling methods, please observe the following cautions. Cautions for Storage * Ensure that storage conditions comply with the standard temperature (5C to 35C) and the standard relative humidity (around 40 to 75%); avoid storage locations that experience extreme changes in temperature or humidity. * Avoid locations where dust or harmful gases are present and avoid direct sunlight. * Reinspect for rust on leads and solderability of products that have been stored for a long time. Cautions for Testing and Handling When tests are carried out during inspection testing and other standard test periods, protect the products from power surges from the testing device, shorts between adjacent products, and shorts to the heatsink. Remarks About Using Silicone Grease with a Heatsink
*
Our recommended silicone greases for heat radiation purposes, which will not cause any adverse effect on the product life, are indicated below: Type G746 YG6260 Suppliers Shin-Etsu Chemical Co., Ltd. GE Toshiba Silicone Co., Ltd.
SC102 Dow Corning Toray Silicone Co., Ltd. Heatsink Mounting Method Torque When Tightening Mounting Screws. The recommended tightening torque for this product package type is: 58.8 to 68.6 N*cm (6.0 to 7.0 kgf*cm). Soldering * When soldering the products, please be sure to minimize the working time, within the following limits: 2605C 10 s 3505C 3 s
*
* *
When silicone grease is used in mounting this product on a heatsink, it shall be applied evenly and thinly. If more silicone grease than required is applied, it may produce stress. Volatile-type silicone greases may permeate the product and produce cracks after long periods of time, resulting in reduced heat radiation effect, and possibly shortening the lifetime of the product.
Soldering iron should be at a distance of at least 1.5 mm from the body of the products Electrostatic Discharge * When handling the products, operator must be grounded. Grounded wrist straps worn should have at least 1 M of resistance to ground to prevent shock hazard. * Workbenches where the products are handled should be grounded and be provided with conductive table and floor mats. * When using measuring equipment such as a curve tracer, the equipment should be grounded. * When soldering the products, the head of soldering irons or the solder bath must be grounded in other to prevent leak voltages generated by them from being applied to the products. * The products should always be stored and transported in our shipping containers or conductive containers, or be wrapped in aluminum foil.
Sanken Electric Co., Ltd. 3-6-3 Kitano, Niiza-shi, Saitama-ken 352-8666, Japan Phone:+81-48-472-1111 http://www.sanken-ele.co.jp
9
SI-8008HFE
DC-to-DC Step-Down Converter
Application and operation examples described in this document are quoted for the sole purpose of reference only, for the use of the products herein, and Sanken can assume no responsibility for any infringement of industrial property rights, intellectual property rights, or any other rights of Sanken or any third party which may result from its use. When using the products herein, the applicability and suitability of such products for an intended purpose or object shall be reviewed at the user's responsibility. Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure and defect of semiconductor products at a certain rate is inevitable. Users of Sanken products are requested to take, at their own risk, preventative measures including safety design of the equipment or systems against any possible injury, death, fires or damages to the society due to device failure or malfunction. Sanken products listed in this document are designed and intended for the use as components in general purpose electronic equipment or apparatus (home appliances, office equipment, telecommunication equipment measuring equipment, etc.). Before placing an order, the user's written consent to the specifications is requested. When considering the use of Sanken products in the applications where higher reliability is required (transportation equipment and its control systems, traffic signal control systems or equipment, fire/crime alarm systems, various safety devices, etc.), please contact your nearest Sanken sales representative to discuss and obtain written confirmation of your specifications. The use of Sanken products without the written consent of Sanken in the applications where extremely high reliability is required (aerospace equipment, nuclear power control systems, life support systems, etc.) is strictly prohibited. Anti radioactive ray design is not considered for the products listed herein. If there is any discrepancy between English and Japanese versions of this datasheet, the Japanese version should take precedence over the English one. Please accept in advance that the content of this datasheet is subject to change without notice for the purpose of such as improvement of the product.
Copyright (c) 2007 Sanken Electric Co., Ltd.
This datasheet is based on Sanken datasheet SSJ-03128
Sanken Electric Co., Ltd. 3-6-3 Kitano, Niiza-shi, Saitama-ken 352-8666, Japan Phone:+81-48-472-1111 http://www.sanken-ele.co.jp
10
DC-to-DC Step-Down Converter
SI-8008HFE

June, 2007
Asia Pacific
China
Sanken Electric Hong Kong Co., Ltd. Suite 1026 Ocean Centre, Canton Road, Tsimshatsui, Kowloon, Hong Kong Tel: 852-2735-5262 Fax: 852-2735-5494 Sanken Electric (Shanghai) Co., Ltd. Room3202, Maxdo Centre, Xingyi Road 8, Changning district, Shanghai, China Tel: 86-21-5208-1177 Fax: 86-21-5208-1757
India
Saket Devices Pvt. Ltd. Office No.13, First Floor, Bandal - Dhankude Plaza, Near PMT Depot, Paud Road, Kothrud, Pune - 411 038, India Tel: 91-20-5621-2340 91-20-2528-5449 Fax: 91-20-2528-5459
Japan
Sanken Electric Co., Ltd. Overseas Sales Headquaters Metropolitan Plaza Bldg. 1-11-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-0021, Japan Tel: 81-3-3986-6164 Fax: 81-3-3986-8637
Korea
Sanken Electric Korea Co., Ltd. Mirae Asset Life Bldg. 6F, 168 Kongduk-dong, Mapo-ku, Seoul, 121-705, Korea Tel: 82-2-714-3700 Fax: 82-2-3272-2145
Singapore
Sanken Electric Singapore Pte. Ltd. 150 Beach Road, #14-03 The Gateway West, Singapore 189720 Tel: 65-6291-4755 Fax: 65-6297-1744
Taiwan
Taiwan Sanken Electric Co., Ltd. Room 1801, 18th Floor, 88 Jung Shiau East Road, Sec. 2, Taipei 100, Taiwan R.O.C. Tel: 886-2-2356-8161 Fax: 886-2-2356-8261
Sanken Electric Co., Ltd.
I02-008EA-070703
DC-to-DC Step-Down Converter
SI-8008HFE
Europe
United Kingdom
Sanken Power Systems (UK) Limited Pencoed Technology Park Pencoed, Bridgend CF35 5HY. UK Tel: 44-1656-869-100 Fax: 44-1656-869-162
June, 2007
North America
United States
Allegro MicroSystems, Inc. 115 Northeast Cutoff, Worcester, Massachusetts 01606, U.S.A. Tel: 1-508-853-5000 Fax: 1-508-853-3353 Allegro MicroSystems, Inc. (Southern California) 14 Hughes Street, Suite B105, Irvine, CA 92618 Tel: 1-949-460-2003 Fax: 1-949-460-7837
Sanken Electric Co., Ltd.
I02-008EA-070703

▲Up To Search▲

Price & Availability of SI-8008HFE

	To Download SI-8008HFE Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .