19-1211; Rev 0; 3/97 MAX1630/MAX1631/MAX1632 Evaluation Kits ____________________________Features ♦ Battery Range: 5.2V to 20V (MAX1630) 5.2V to 28V (MAX1631) 6.5V to 28V (MAX1632) ♦ Outputs: 3.3V at 3A 5V at 3A 12V at 120mA 5V at 30mA Keep-Alive ♦ 1:4 Transformer (MAX1630) 1:2.2 Transformer (MAX1632) ♦ Adjustable 2.5V to 5.5V Outputs (optional resistor divider) ♦ Precision 2.5V Reference Output ♦ Oscillator Sync Input ♦ Low-Noise Mode Control Input (SKIP) ♦ Power-Good Monitor (RESET output) ♦ Fully Assembled and Tested ______________Ordering Information PART TEMP. RANGE BOARD TYPE MAX1630EVKIT-SO 0°C to +70°C Surface Mount MAX1631EVKIT-SO MAX1632EVKIT-SO 0°C to +70°C 0°C to +70°C Surface Mount Surface Mount ________________________________Components Common to All Three EV Kits DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION C1, C7, C21, C22, C25 5 0.1µF ceramic capacitors D3 1 100mA, 30V dual Schottky diode Central Semiconductor CMPSH-3A C2, C3, C12, C13, C20 5 220µF, 10V, low-ESR tantalum caps Sprague 594D227X0010D2T or 595D227X0010R2T D6 1 200mA, 75V dual diode Central Semiconductor CMPD2838 C5, C6, C15, C16 4 10µF, 30V electrolytic capacitors Sanyo OS-CON 30SC10M N1–N4 4 4 1 4.7µF, 25V ceramic capacitor United Chemicon/Marcon THCR40E1E475Z R1–R4 C8 R5, R8 2 C9, C14 2 4.7µF, 16V tantalum capacitors Sprague 595D475X0016A2B C10, C18, C23 3 0.01µF ceramic capacitors C17 1 0.22µF ceramic capacitor C19 0 Open 4.7µF, 35V tantalum capacitor Sprague 595D475X0035C2B or 5950475X0035B2B 1A, 40V Schottky diodes Nihon EC10QS04 or Motorola MBRS140T3 C24 D1, D5, D7, D8 1 4 R6, R7, R10–R13, R15–R18 R9 N-channel MOSFETs International Rectifier IRF7413 or Siliconix Si4410DY 2MΩ, 5% resistors 0.020Ω, 1% resistors Dale WSL-2010-R020-F or IRC LR2010-01-R020-F 0 Open 1 1kΩ, 5% resistor R14 1 100kΩ, 5% resistor R19 1 10Ω, 5% resistor SW1 1 DIP-8 dip switch None 1 MAX1630/MAX1631/MAX1632 PC board ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 Evaluate: MAX1630/MAX1631/MAX1632 _______________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. Evaluate: MAX1630/MAX1631/MAX1632 MAX1630/MAX1631/MAX1632 Evaluation Kits MAX1630 EV Kit ____________Additional Components MAX1631 EV Kit ____________Additional Components DESIGNATION QTY DESIGNATION QTY DESCRIPTION C4 1 2.2µF, 25V tantalum capacitor Sprague 595D225X0025B2B C11 0 Open D2 1 1A, 100V, fast-recovery diode Nihon EC11FS1 or Motorola MBRS1100T3 D4 0 Open JU1, JU3–JU6, JU8, JU10, JU11 8 2-pin headers JU5 1 Shunt L2 1 10µH power inductor Sumida CDRH125-100 (shielded) or Coiltronics UP2-100 or Coilcraft DO3316P-103 T1 1 10µH, 1:4 transformer Transpower Technologies TTI-5902 U1 1 MAX1630 (SSOP-28) Maxim MAX1630CAI MAX1632 EV Kit ____________Additional Components DESIGNATION QTY DESCRIPTION 0 Open D2, D4 0 Open JU1, JU3–JU6 5 2-pin headers JU5 1 Shunt JU10, JU11 2 Short L1, L2 2 10µH power inductors Sumida CDRH125-100 (shielded) or Coiltronics UP2-100 or Coilcraft DO3316P-103 U1 1 MAX1631 (SSOP-28) Maxim MAX1631CAI ______________Component Suppliers SUPPLIER* PHONE FAX AVX (803) 946-0690 (803) 626-3123 Central Semiconductor (516) 435-1110 (516) 435-1824 Coilcraft (847) 639-6400 (847) 639-1469 Coiltronics (561) 241-7876 (561) 241-9339 Dale-Vishay (402) 564-3131 (402) 563-6418 International Rectifier (310) 322-3331 (310) 322-3332 C4 0 Open IRC (512) 992-7900 (512) 992-3377 C11 1 2.2µF, 25V tantalum capacitor Sprague 595D225X0025B2B Motorola (602) 303-5454 (602) 994-6430 Nihon (805) 867-2555 (805) 867-2698 1A, 100V, fast-recovery diode Nihon EC11FS1 or Motorola MBRS1100T3 Sanyo (619) 661-6835 (619) 661-1055 Siliconix (408) 988-8000 (408) 970-3950 Sprague (603) 224-1961 (603) 224-1430 Sprague/Sanyo (207) 324-4140 (207) 324-7223 Sumida (847) 956-0666 (847) 956-0702 Vishay/Vitramon (203) 268-6261 (203) 452-5670 Transpower Technologies (702) 831-0140 (702) 831-3521 D4 1 1 10µH power inductor Sumida CDRH125-100 (shielded) or Coiltronics UP2-100 or Coilcraft DO3316P-103 T2 1 10µH, 1:2.2 transformer Transpower Technologies TTI-5870 JU1, JU3–JU6, JU8, JU10, JU11 8 2-pin headers JU5 1 Shunt U1 1 MAX1632 (SSOP-28) Maxim MAX1632CAI L1 2 DESCRIPTION C4, C11 *Note: Please indicate that you are using the MAX1630/ MAX1631/MAX1632 when contacting these component suppliers. _______________________________________________________________________________________ MAX1630/MAX1631/MAX1632 Evaluation Kits 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. 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. 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 2MΩ logic pull-down resistors. Shorted out or driven by logic. R14 100kΩ SYNC pull-up resistor (usually shorted out). SYNC to VL. SHUNT LOCATION SEQ PIN POWER-UP SEQUENCE JU3 Connected to GND 5V before 3.3V JU4 Connected to VL 3.3V before 5V JU5 Connected to REF Separate ON3/ON5 controls Table 2. Jumper JU6 Functions SHUNT JU6 LOCATION SYNC PIN FREQUENCY (kHz) On Connected to GND 200 Off Connected to VL 300 R6, R7 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 FUNCTION JU1 Connects the secondary feedback to R10 and R11. JU2 Used in MAX1630 and MAX1632 for normal connections. JU8 Steers secondary feedback to the 3.3V SMPS. JU10 Steers secondary feedback to the 5V SMPS. JU11 Disables secondary feedback. _______________________________________________________________________________________ 3 Evaluate: MAX1630/MAX1631/MAX1632 _________________________Quick Start Evaluate: MAX1630/MAX1631/MAX1632 MAX1630/MAX1631/MAX1632 Evaluation Kits VIN C6 10µF 30V R19 C5 10µF 30V 10Ω C18 0.01µF C21 0.1µF VL C24 4.7µF 35V 3 D6 CMPD2838 R +5V N1 2 22 V+ D2 L 25 VDD 1 OPEN OPEN C4 C17 0.22µF 27 BST3 DH3 R16 R5 10 0.02Ω 1 +3.3V D7 R6 OPEN C20 220µF 10V C3 220µF 10V C2 220µF 10V C1 0.1µF 7 T1/ L1 26 R15 D1 VIN 1 8 R7 OPEN JU9 CUT HERE 24 SW1A 7 SW1B 6 SW1C 5 2 SW1D FB3 1 2 3 3 10 23 SHDN 7 28 ON3 R4 2M R2 2M R1 2M R9 1k 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 DL3 CSH3 CSL3 FB3 4 SKIP ON5 MAX LX3 N2 VL FB3 U 3 _______________________________________________________________________________________ SKIP SHDN TIME/ON5 RUN/ON3 GND C10 0.01µF 8 R3 2M MAX1630/MAX1631/MAX1632 Evaluation Kits D3 C22 0.1µF 2 3 C16 10µF 30V C23 0.01µF VL C25 0.1µF 21 VL 12OUT VDD BST5 DH5 32 VDD LX5 17 DL5 19 PGND 20 CSH5 CSL5 FB5 SEQ REF SYNC RESET D4 10 N3 7 C7 0.1µF T2/ L2 N4 VDD RAW +15V 3 C11 2.2µF 25V 1 R17 +12V JU2 CUT HERE C9 4.7µF 16V 18 R18 JU8 JU10 JU11 4 C8 4.7µF 5 16 Evaluate: MAX1630/MAX1631/MAX1632 1 C15 10µF 30V JU1 R10 R11 OPEN OPEN D5 R8 0.020Ω 14 13 +5V C12 220µF 10V 12 15 JU3 9 JU4 6 JU5 C13 220µF 10V +2.5V RESET D8 R13 OPEN JU7 CUT HERE VL 11 C14 4.7µF 16V R12 OPEN C19 OPEN VL R14 100k SYNC JU6 _______________________________________________________________________________________ 5 Evaluate: MAX1630/MAX1631/MAX1632 MAX1630/MAX1631/MAX1632 Evaluation Kits 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 _______________________________________________________________________________________ 7 Evaluate: MAX1630/MAX1631/MAX1632 MAX1630/MAX1631/MAX1632 Evaluation Kits 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 © 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.