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Data Sheet No. PD 96953A
IRIS-W6756
Features
* 6-pin SIP type full molded package, optimum IC for low-height SMPS, distance between high and low voltage pins is 1.8 mm with pin elimination. * Oscillator is provided on the monolithic control with adopting On-Chip Trimming Technology * Small temperature characteristics variation by adopting a comparator to compensate for temperature on the control part. * Low start-up circuit current (100uA max) *Avalanche energy guaranteed MOSFET with high VDSS The built-in power MOSFET simplifies the surge absorption circuit since the MOSFET guarantees the avalanche energy. No VDSS de-rating is required. * Built-in constant voltage drive circuit * Built-in step drive circuit * Built-in low frequency PWM mode (22 kHz) * UVLO Burst Standby TO-220 Fullpack (7 Lead modified) * Two operational modes by auto switching functions according to load For middle~heavy load operation : QR mode Key Specifications For light~middle load operation : 1 Bottom Skip mode MOSFET RDS(ON) Pout(W) * Various kinds of protection functions T ype VDSS(V) MAX AC input(V) Note 1 Pulse-by-Pulse Overcurrent Protection (OCP) Overvoltage Protection with Latch mode (OVP) Overload Protection with Latch mode (OLP) The maximum limit of on-time
230 15% IRIS-W6756 650 0.73 85 to 264 240 140
INTEGRATED SWITCHER
Package Outline
Description
IRIS-W6756 is a hybrid IC consisting of a power MOSFET and a controller IC, designed for Quasi-Resonant (including low frequency PWM) fly-back converter type SMPS (Switching Mode Power Supply) applications. This IC realizes high efficiency, low noise, downsizing and standardizing of a power supply system reducing external component count and simplifying the circuit design.
Typical Connection Diagram
IRIS-W6756
O CP / BD FB SS / O LP Vcc S/ G ND D
Note 1: The Pout (W) represents the thermal rating at Quasi-Resonant operation, and the peak power output is obtained by approximating 120 to 140 % of the above listed value. When the output voltage is low, and the ON-duty is narrow, the Pout (W) shall become lower than that of the above.
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IRIS-W6756
Absolute Maximum Ratings (Ta=25C)
Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters are absolute voltages referenced to terminals stated, all currents are defined positive into any lead. The thermal resistance and power dissipation ratings are measured under board mounted and still air conditions.
Symbol Definition IDpeak Drain Current * 1 IDMAX EAS Vcc VSSOLP IFB VFB VOCPBD P D1 PD2 TF Top Tstg Tch Maximum switching current *2 Single pulse avalanche energy *3 Input voltage for control part SS/OLP pin voltage FB pin inflow current FB pin voltage O.C.P/F.B pin voltage Power dissipation of MOSFET *4 Power dissipation for control part (MIC) Internal frame temperature in operation Operating ambient temperature Storage temperature Channel temperature Terminal s 1-3 1-3 1-3 4-3 5-3 6- 3 6- 3 7- 3 1-3 4-3 Max. Ratings 15 15 400 35 -0.5 ~ 6.0 10 -0.5 ~ 9.0 -1.5 ~ 5.0 29 1.3 0.8 -20 ~ +115 -20 ~ +115 -40 ~ +125 150 Units A A mJ V V mA V V W W With infinite heatsink Without heatsink Specified by Vcc x Icc
Refer to recommended operating temperature within the limits of IFB
Note Single Pulse Ta=-20~+125 Single Pulse VDD=99V,L=20mH ILpeak =6.05A
*1 Refer to MOS FET A.S.O. curve *2 Maximum switching current The maximum switching current is the Drain current determined by the drive voltage of the IC and threshold voltage (Vth) of the MOS FET. *3 Refer to MOS FET Tch-EAS curve *4 Refer to MOS FET Ta-PD1 curve
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IRIS-W6756
Electrical Characteristics (for Control IC)
Electrical characteristics for control part (Ta=25, Vin=20V,unless otherwise specified)
Ratings Units MIN TYP MAX Note
Symbol Power Supply Start-up Operation
Definition
Terminal s
VCC(ON) VCC(OFF) ICC(ON) ICC(OFF) fosc VSSOLP(SS) ISSOLP(SS)
Operation Start Voltage Operation Stop Voltage Circuit Current in Operation Circuit Current in Non-Operation Oscillation Frequency Soft Start Operation Stop Voltage Soft Start Operation Charging Current
4-3 4-3 4-3 4-3 1-3 5-3 5-3
16.3 8.8 19 1.1 -710
18.2 9.7 22 1.2 -550
19.9 10.6 6 100 25 1.4 -390
V V mA A kHz V A
Vcc=019.9V Vcc=19.98.8 V Vcc=15V -
Normal Operation
VOCPBD(BS1) VOCPBD(BS2) VOCPBD(LIM) IOCPBD VOCPBD(TH1) VOCPBD(TH2) VFB(OFF) IFB(ON)
Bottom-Skip Operation Threshold Voltage1 Bottom-Skip Operation Threshold Voltage2 Overcurrent Detection Threshold Voltage OCP/BD Pin Outflow Current Quasi-Resonant Operation Threshold Voltage 1 Quasi-Resonant Operation Threshold Voltage 2 FB Pin Threshold Voltage FB Pin Inflow Current (Normal Operation)
7-3 7-3 7-3 7-3 7-3 7-3 6-3 6-3
-0.72 -0.485 -0.995 -250 0.28 0.67 1.32 600
-0.665 -0.435 -0.94 -100 0.4 0.8 1.45 1000
-0.605 -0.385 -0.895 -40 0.52 0.93 1.58 1400
V V V A V V V A
-
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IRIS-W6756
Electrical Characteristics (for Control IC), Cont'd.
Stand-by Operation
VCC(S) VCC(SK) ICC(S) IFB(S) VFB(S) TON(MIN)
Stand-by Operation Start Voltage Stand-by Operation Start Voltage Interval Stand-by Non-Operation Circuit Current FB Pin Inflow Current (Stand-by) Stand-by Operation FB Pin Threshold Voltage Minimum ON Time
4-3 4-3 4-3 6-3
10.3 1.1 -
11.1 1.35 20 4
12.1 1.65 56 14
V V A A
Vcc=012.2V Vcc=10.2V Vcc=10.2V
6-3 1-3
0.55 0.65
1.1 1.0
1.5 1.35
V Sec
Vcc=12.2V -
Protection Operation
TON(MAX) VSSOLP(OLP) ISSOLP(OLP) VCC(OVP) ICC(H)
VCC(La.OFF)
Maximum ON Time OLP Operation Threshold Voltage OLP Operation Charging Current OVP Operation Voltage Latch Circuit Holding Current *5
1-3 5-3 5-3 4-3 4-3 4-3
27.5 4 -16 25.5 -6
32.5 4.9 -11 27.7 45 7.2
39 5.8 -6 29.9 140 8.5
Sec V A V
Vcc=029.9V Vcc=29.9 VCC(OFF)-0.3V Vcc=29.96V
A
V
Latch Circuit Release Voltage *5
*5 The latch circuit means a circuit operated O.V.P and O.L.P. *6 The current ratings are based on those of the IC , and plus(+) represents sink and minas(-) represents source.
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IRIS-W6756
Electrical characteristics for MOSFET (Ta=25 deg C) Ratings Symbol VDSS IDSS RDS(ON) tf ch-F Definition Drain-to-Source breakdown voltage Drain leakage current On-resistance Switching time Thermal resistance Terminals 1-3 1-3 1-3 1-3 MIN 650 TYP MAX 300 0.73 400 1.5 Units V A nSec /W Note
ID=300A VDS=650V ID=2.2A
Between channel and internal frame
IRIS-W6756
A.S.O. temperature derating coefficient curve
IRIS-W6756 MOS FET A.S.O. curve 100
Ta=25C Single Pulse
100 A.S.O. temperature derating coefficient[%]
80 Drain Current ID[A] 10
Drain current limit by ON resistance 1ms 0.1ms
60
40
1
ASO temperature derating shall be made by obtaining ASO Coefficient from the left curve in your use.
20
0 0 20 40 60 80 100 120
0.1 10 100 Drain-to-Source Voltage VDS[V] 1000
Internal frame temperature TF] [
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IRIS-W6756
IRIS-W6756 MOSFET Ta-PD1 Curve 35
PD1=29[W]
IR IS-W 6 756 Avalanche energy derating curve 1 00
EAS temperature derating coefficient [%]
30
With infinite heatsink
80
Power dissipation PD1[W]
25
20
60
15
40
10
Without heatsink PD1=1.3[W]
20
5
0 0 20 40 60 80 100 120 140 160 Ambient temperature Ta[]
0 25 50 75 100 12 5 150 C hannel tem p erature T ch [ ]
IRIS-W6756 Transient thermal resistance curve
Transient thermal resistance ch-c [/W]
10
1
0.1
0.01
0.001
1
10
100
Time [sec]
1m
10m
100m
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IRIS-W6756 Block Diagram
VCC

Reg& Iconst
Burst Control
Protection latch R Q S
DRIVE Reg
D
Delay
OVP
Start Stop Burst
S/GND

FB
RQ S Q OSC MaxON
FB
S R
OCP
BSD
OLP Soft Start

BD
Bottom Selector Counter

OCP/BD SS/OLP

Pin Designation
Pin Assignments
Pin No. 1
Symbols D S/GND VCC SS/OLP
Descriptions Drain pin Source /Ground pin Power supply pin Delay at Overload /Soft Start set up Pin Feedback pin Overcurrent Protection Input / Bottom Detection Pin
Functions MOSFET drain MOSFET Source / Ground Input of power supply for control circuit Overload Protection and Soft Start Operation Time set up Constant Voltage Control Signal Input, Burst(intermittent) mode Oscillation Control Overcurrent Detection Signal Input /Bottom Detection Signal Input
IRIS
3 4 5
D S/GND Vcc SS/OLP FB OCP/BD
1
34567
6
FB
7
OCP/BD
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IRIS-W6756 Case Outline
10.00.2 0.5 gate burr 4.20.2 2.80.2
4 0.2
7.90.2 16.90.3
IRIS
a b
2.60.1
2.8
5 0.5
6-0.740.15
+0.2
6-0.65-0.1
R-end (5.4)
10.40.5
3.2
1) -R (2
0.1 0.45-0.1
+0.2
6xP1.270.15=7.620.15
5.080.6
a Type Number W6756 b Lot Number 1st letter The last digit of year 2nd letter Month 1 to 9 for Jan. to Sept., O for Oct. N for Nov. D for Dec. 3rd & 4th letter Day Arabic Numerals 5th letter : Registration Symbol Weight : Approx. 2.3g Dimensions in mm DWG.No. TG3A-2103
0.5
0.5
0.5
0.5
12
34567
Material of Pin : Cu Treatment of Pin : Ni plating + solder dip
Data and specifications subject to change without notice.
IR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105 TAC FAX: (310) 252-7903 Visit us at www.irf.com for sales contact information.
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