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19-1211; Rev 0; 3/97
MAX1630/MAX1631/MAX1632 Evaluation Kits
_______________General Description
The MAX1630/MAX1631/MAX1632 evaluation kits (EV kits) each consist of one of three preassembled and tested evaluation boards (EV boards) that embody the standard application circuits. The MAX1630 and MAX1632 EV boards provide the triple-output 3.3V/5V/ 12V circuit, and the MAX1631 EV board provides the dual-output 3.3V/5V circuit. All three use the same PC board but have different components to accommodate different input voltage ranges. The main differences between the MAX1630 and MAX1632 EV boards are in the turns ratio (1:4 or 1:2.2) and in the location of the transformer connection (3.3V side or 5V side). Connecting the transformer to the 3.3V side allows lower input voltage. Connecting the transformer to the 5V side provides slightly better efficiency and lower stress voltages. These circuits are configured to deliver up to 3A of output current on each of the main PWM outputs with greater than 90% efficiency. The MAX1630/MAX1631/ MAX1632 EV kits can also be used to evaluate other output voltages.
____________________________Features
o Battery Range: 5.2V to 20V (MAX1630) 5.2V to 28V (MAX1631) 6.5V to 28V (MAX1632) o Outputs: 3.3V at 3A 5V at 3A 12V at 120mA 5V at 30mA Keep-Alive
Evaluate: MAX1630/MAX1631/MAX1632
o 1:4 Transformer (MAX1630) 1:2.2 Transformer (MAX1632) o Adjustable 2.5V to 5.5V Outputs (optional resistor divider) o Precision 2.5V Reference Output o Oscillator Sync Input o Low-Noise Mode Control Input (SKIP) o Power-Good Monitor (RESET output) o Fully Assembled and Tested
______________Ordering Information
PART MAX1630EVKIT-SO MAX1631EVKIT-SO MAX1632EVKIT-SO TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C BOARD TYPE Surface Mount Surface Mount Surface Mount
________________________________Components Common to All Three EV Kits
DESIGNATION QTY C1, C7, C21, C22, C25 C2, C3, C12, C13, C20 C5, C6, C15, C16 C8 C9, C14 C10, C18, C23 C17 C19 C24 D1, D5, D7, D8 5 5 4 1 2 3 1 0 1 DESCRIPTION 0.1F ceramic capacitors 220F, 10V, low-ESR tantalum caps Sprague 594D227X0010D2T or 595D227X0010R2T 10F, 30V electrolytic capacitors Sanyo OS-CON 30SC10M 4.7F, 25V ceramic capacitor United Chemicon/Marcon THCR40E1E475Z 4.7F, 16V tantalum capacitors Sprague 595D475X0016A2B 0.01F ceramic capacitors 0.22F ceramic capacitor Open 4.7F, 35V tantalum capacitor Sprague 595D475X0035C2B or 5950475X0035B2B 1A, 40V Schottky diodes Nihon EC10QS04 or Motorola MBRS140T3 DESIGNATION QTY D3 D6 N1-N4 R1-R4 R5, R8 R6, R7, R10-R13, R15-R18 R9 R14 R19 SW1 None 1 1 4 4 2 DESCRIPTION 100mA, 30V dual Schottky diode Central Semiconductor CMPSH-3A 200mA, 75V dual diode Central Semiconductor CMPD2838 N-channel MOSFETs International Rectifier IRF7413 or Siliconix Si4410DY 2M, 5% resistors 0.020, 1% resistors Dale WSL-2010-R020-F or IRC LR2010-01-R020-F Open 1k, 5% resistor 100k, 5% resistor 10, 5% resistor DIP-8 dip switch MAX1630/MAX1631/MAX1632 PC board 1
0 1 1 1 1 1
4
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAX1630/MAX1631/MAX1632 Evaluation Kits Evaluate: MAX1630/MAX1631/MAX1632
MAX1630 EV Kit ____________Additional Components
DESIGNATION QTY C4 C11 D2 D4 JU1, JU3-JU6, JU8, JU10, JU11 JU5 L2 1 0 1 0 8 1 1 DESCRIPTION 2.2F, 25V tantalum capacitor Sprague 595D225X0025B2B Open 1A, 100V, fast-recovery diode Nihon EC11FS1 or Motorola MBRS1100T3 Open L1, L2 2-pin headers Shunt 10H power inductor Sumida CDRH125-100 (shielded) or Coiltronics UP2-100 or Coilcraft DO3316P-103 10H, 1:4 transformer Transpower Technologies TTI-5902 MAX1630 (SSOP-28) Maxim MAX1630CAI U1 1 2
MAX1631 EV Kit ____________Additional Components
DESIGNATION QTY C4, C11 D2, D4 JU1, JU3-JU6 JU5 JU10, JU11 0 0 5 1 2 Open Open 2-pin headers Shunt Short 10H power inductors Sumida CDRH125-100 (shielded) or Coiltronics UP2-100 or Coilcraft DO3316P-103 MAX1631 (SSOP-28) Maxim MAX1631CAI DESCRIPTION
______________Component Suppliers
SUPPLIER* AVX Central Semiconductor Coilcraft Coiltronics Dale-Vishay International Rectifier IRC Motorola Nihon Sanyo Siliconix Sprague Sprague/Sanyo Sumida Vishay/Vitramon Transpower Technologies PHONE (803) 946-0690 (516) 435-1110 (847) 639-6400 (561) 241-7876 (402) 564-3131 (310) 322-3331 (512) 992-7900 (602) 303-5454 (805) 867-2555 (619) 661-6835 (408) 988-8000 (603) 224-1961 (207) 324-4140 (847) 956-0666 (203) 268-6261 (702) 831-0140 FAX (803) 626-3123 (516) 435-1824 (847) 639-1469 (561) 241-9339 (402) 563-6418 (310) 322-3332 (512) 992-3377 (602) 994-6430 (805) 867-2698 (619) 661-1055 (408) 970-3950 (603) 224-1430 (207) 324-7223 (847) 956-0702 (203) 452-5670 (702) 831-3521
T1 U1
1 1
MAX1632 EV Kit ____________Additional Components
DESIGNATION QTY C4 C11 0 1 Open 2.2F, 25V tantalum capacitor Sprague 595D225X0025B2B 1A, 100V, fast-recovery diode Nihon EC11FS1 or Motorola MBRS1100T3 10H power inductor Sumida CDRH125-100 (shielded) or Coiltronics UP2-100 or Coilcraft DO3316P-103 10H, 1:2.2 transformer Transpower Technologies TTI-5870 2-pin headers Shunt MAX1632 (SSOP-28) Maxim MAX1632CAI DESCRIPTION
D4
1
L1
1
T2 JU1, JU3-JU6, JU8, JU10, JU11 JU5 U1
1
8 1 1
*Note: Please indicate that you are using the MAX1630/ MAX1631/MAX1632 when contacting these component suppliers.
2
_______________________________________________________________________________________
MAX1630/MAX1631/MAX1632 Evaluation Kits
_________________________Quick Start
The MAX1630/MAX1631/MAX1632 EV kits are fully assembled and tested. Follow these steps to verify board operation. Do not turn on the power supply until all connections are completed. 1) Connect a bench power supply (50W or better) to the VIN and GND pads at the edge of the board. 2) Connect voltmeters and loads (if any) to the VOUT pads. 3) Verify that switch SW1 positions SHDN, ON5, and ON3 are on, and that the shunt is across JU5. 4) Turn on the power supply and verify that the output voltages are 3.3V and 5V.
Jumper Selection
The three 2-pin headers JU3, JU4, and JU5 select the power-up sequence mode. Table 1 lists the selectable jumper options. The 2-pin header JU6 selects the operating frequency. Table 2 lists the selectable jumper options. The EV kit's components are selected for 300kHz operation. Component values might need to be changed if 200kHz operation is selected (refer to the Design Procedure section in the MAX1630-MAX1635 data sheet). Synchronize the oscillator to an external clock signal by driving the SYNC pad with a pulse train of 5V amplitude in the 240kHz to 350kHz frequency range.
Evaluate: MAX1630/MAX1631/MAX1632
Table 1. Jumper JU3, JU4, JU5 Functions
_______________Detailed Description
Output Voltage
The main output voltages come preset to 3.3V and 5V. Install resistors R6/R7 and R12/R13 for adjustable mode. Two small PC trace jumpers, JU9 and JU7, shunt FB3 and FB5 to GND on the board. These default jumpers must be cut for adjustable-mode operation. Refer to the MAX1630-MAX1635 data sheet for instructions on calculating R6/R7 and R12/R13. Do not operate the circuit without a jumper or resistordivider installed, or output overvoltage will damage the IC. In addition to the standard components, the extra pullup and pull-down resistors listed below are used to set logic input levels. These resistors can usually be omitted in the final design. R6, R7 Adjustable-mode resistor-divider (not installed). VOUT = 2.5V (1 + R6 / R7). R12, R13 Adjustable-mode resistor-divider (not installed). VOUT = 2.5V (1 + R12 / R13). R1-R4 2M logic pull-down resistors. Shorted out or driven by logic. R14 100k SYNC pull-up resistor (usually shorted out). SYNC to VL.
SHUNT LOCATION JU3 JU4 JU5
SEQ PIN
POWER-UP SEQUENCE
Connected to GND 5V before 3.3V Connected to VL Connected to REF 3.3V before 5V Separate ON3/ON5 controls
Table 2. Jumper JU6 Functions
SHUNT JU6 LOCATION On Off SYNC PIN Connected to GND Connected to VL FREQUENCY (kHz) 200 300
Additional Jumpers (MAX1631 Only)
Additional jumpers on the board along with R10 and R11 are for configuring the MAX1631 for an auxiliary secondary output. R10 and R11 set the secondary feedback voltage (refer to the MAX1630-MAX1635 data sheet). Table 3 lists the MAX1631 jumper settings.
Table 3. MAX1631 Jumper Settings
JUMPER JU1 JU2 JU8 JU10 JU11 FUNCTION Connects the secondary feedback to R10 and R11. Used in MAX1630 and MAX1632 for normal connections. Steers secondary feedback to the 3.3V SMPS. Steers secondary feedback to the 5V SMPS. Disables secondary feedback. 3
_______________________________________________________________________________________
MAX1630/MAX1631/MAX1632 Evaluation Kits Evaluate: MAX1630/MAX1631/MAX1632
VIN C6 10F 30V C5 10F 30V
R19 C18 0.01F C21 0.1F 10
VL 3 D6 CMPD2838 R +5V 2 L 1 D2 VDD OPEN C4 OPEN N1
C24 4.7F 35V 22 V+ 25 27 BST3 DH3
C17 0.22F
R16 R5 10 0.02 1 D7 R6 OPEN FB3 C20 220F 10V C3 220F 10V C2 220F 10V 7 T1/ L1 3 R15 VIN D1 N2 C1 0.1F 26 24 LX3 DL3
U
+3.3V
MAX
VL 8 R7 OPEN JU9 CUT HERE SW1A 1 SKIP SHDN SW1B 2 7 SW1C 3 6 SW1D FB3 4 5
1 2 3 10 23 7
CSH3 CSL3 FB3 SKIP SHDN TIME/ON5 RUN/ON3 GND 8
ON3 ON5 R4 2M R2 2M R1 2M
28 C10 0.01F
R9 1k
R3 2M
MAX1630 L2 = CDRH125-100 T1 = TTI-5902 D4, C11 = OPEN
MAX1631 L1 = CDRH125-100 L2 = CDRH125-100 D2, C4 = OPEN D4, C11 = OPEN
MAX1632 L1 = CDRH125-100 T2 = TTI-5870 D2, C4 = OPEN
Figure 1. MAX1630/MAX1631/MAX1632 EV Kit Schematic
4 _______________________________________________________________________________________
MAX1630/MAX1631/MAX1632 Evaluation Kits Evaluate: MAX1630/MAX1631/MAX1632
1
D3 3
2 C23 0.01F
C22 0.1F
C15 10F 30V
C16 10F 30V
VL C25 0.1F C8 4.7F JU8
21 VL 12OUT VDD BST5 DH5 4 5
JU11
JU10 C9 4.7F 16V 7 D4 10 3 1 C11 2.2F 25V JU2 CUT HERE +12V
VDD 18 R18 16 17 19 20 14 13 12 15 9 6 11 +2.5V C14 4.7F 16V VL R14 100k JU3 JU4 JU5 VL R17 N4 D5 C7 0.1F N3 T2/ L2
RAW +15V JU1 R10 OPEN R8 0.020 R11 OPEN
VDD
32
LX5 DL5 PGND CSH5 CSL5 FB5 SEQ REF SYNC RESET
+5V C12 220F 10V C13 220F 10V R12 OPEN D8 C19 OPEN
R13 OPEN
JU7 CUT HERE
RESET
SYNC JU6
_______________________________________________________________________________________
5
MAX1630/MAX1631/MAX1632 Evaluation Kits Evaluate: MAX1630/MAX1631/MAX1632
1.0"
1.0"
Figure 2. MAX1630/MAX1631/MAX1632 EV Kit Component Placement Guide--Component Side
Figure 3. MAX1630/MAX1631/MAX1632 EV Kit Component Placement Guide--Solder Side
1.0"
Figure 4. MAX1630/MAX1631/MAX1632 EV Kit PC Board Layout--Component Side
6
_______________________________________________________________________________________
MAX1630/MAX1631/MAX1632 Evaluation Kits Evaluate: MAX1630/MAX1631/MAX1632
1.0"
1.0"
Figure 5. MAX1630/MAX1631/MAX1632 EV Kit PC Board Layout--Internal GND Plane
Figure 6. MAX1630/MAX1631/MAX1632 EV Kit PC Board Layout--Internal Voltage Plane
1.0"
Figure 7. MAX1630/MAX1631/MAX1632 EV Kit PC Board Layout--Solder Side
_______________________________________________________________________________________
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MAX1630/MAX1631/MAX1632 Evaluation Kits Evaluate: MAX1630/MAX1631/MAX1632
NOTES
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 ___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 (c) 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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