MAXIM MAX1632EVKIT

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.