MAX1856EVKIT Maxim Integrated, MAX1856EVKIT Datasheet

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MAX1856EVKIT

Manufacturer Part Number
MAX1856EVKIT
Description
Power Management IC Development Tools Evaluation Kit for the MAX1856
Manufacturer
Maxim Integrated
Series
MAX1856r
Datasheet
The MAX1856 evaluation kit (EV kit) is a fully assembled
and tested surface-mount circuit board that contains an
inverting transformer flyback DC-DC converter. The cir-
cuit is configured for two output voltages simultaneous-
ly: a -72V that can supply up to 100mA and a -24V that
can supply up to 400mA. The input voltage may range
from +8V to +24V. The circuit can be configured for
-48V, and supply up to 200mA. When operating from a
+5V input supply, the circuit can deliver up to 7.2W out-
put power in either configuration.
The MAX1856 EV kit switching frequency is set at
250kHz but can range from 100kHz to 500kHz or may
be driven by an external clock. The MAX1856 EV kit
demonstrates low quiescent current and high efficiency
(over 80%). The MAX1856 comes in the 10-pin µMAX
package.
19-1971; Rev 2; 10/01
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
DESIGNATION
C3, C4
C6, C7
C1
C2
C5
C8
C9
________________________________________________________________ Maxim Integrated Products
QTY
1
1
2
1
0
1
1
General Description
DESCRIPTION
22µF, 100V aluminum electrolytic
capacitor (8 x 11.5)
Sanyo 100MV22AX
100µF, 35V aluminum
electrolytic capacitor (8 x 11.5)
Sanyo 35MV100AX
10µF ±10%, 25V X5R ceramic
capacitors (1812)
Taiyo Yuden TMK432BJ106KM
100pF ±10%, 200V COG ceramic
capacitor (0805)
Murata GRM40COG101K200
Not installed
470pF ±10%, 200V X7R ceramic
capacitor (0805)
Murata GRM40X7R471K200
1µF ±10%, 25V X7R ceramic
capacitor (1206)
Taiyo Yuden TMK316BJ105KL
MAX1856 Evaluation Kit
o +8V to +24V Input Range
o +5V Input Range at Up to 7.2W Output Power
o Output Voltages
o Configurable for -48V at 200mA Output
o 100kHz to 500kHz Switching Frequency
o External Frequency Control
o Low-Cost Minimum Components with Flyback
o Fully Assembled and Tested
MAX1856EVKIT
DESIGNATION
Design
C10, C13
VOUT1 = -72V at 100mA
VOUT2 = -24V at 400mA
C11
C12
D1
D2
D3
T1
PART
SLIC Power Supply
QTY
2
1
1
1
0
1
1
TEMP RANGE
Ordering Information
0°C to +70°C
DESCRIPTION
1000pF ±5%, 50V NP0 ceramic
capacitors (0805)
AVX 0805-5A-102-JAT-2A
1µF ±10%, 10V X7R ceramic
capacitor (0805)
Taiyo Yuden LMK212BJ105KG
2.2µF ±10% , 10V cer am i c
capacitor ( 1206)
M ur ata GRM 42- 6X 7R225K010AD
1A, 400V, ultra-fast-recovery
diode (SMB)
Central Semiconductor Corp
CMR1U-04
Not installed
1A, 200V, ultra-fast-recovery
diode (SMB)
Central Semiconductor Corp
CMR1U-02
22µH, 1:2:2:2, 6.7A transformer
Coiltronics CTX01-14853 or
ICE Components ICA-0635
Component List
IC PACKAGE
10 µMAX
Features
1

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MAX1856EVKIT Summary of contents

Page 1

... Configurable for -48V at 200mA Output o 100kHz to 500kHz Switching Frequency o External Frequency Control o Low-Cost Minimum Components with Flyback Design o Fully Assembled and Tested Ordering Information PART TEMP RANGE MAX1856EVKIT 0°C to +70°C Component List DESIGNATION QTY DESCRIPTION 1000pF ±5%, 50V NP0 ceramic C10, C13 2 ...

Page 2

MAX1856 Evaluation Kit SLIC Power Supply Component List (continued) DESIGNATION QTY DESCRIPTION 3.8A, 55V, N-channel MOSFET (SOT223 International Rectifier IRLL2705 200Ω ±5% resistor (2512 R2 Not installed 10Ω ±5% resistors (1206) R4 ...

Page 3

When the input voltage drops to +5V, the total output power will fall to about 7.2W. The MAX1856 EV kit switches at 250kHz but can be var- ied from 100kHz to 500kHz by the internal oscillator in combination with resistor ...

Page 4

MAX1856 Evaluation Kit SLIC Power Supply Figure 1. MAX1856 EV Kit Schematic 4 _______________________________________________________________________________________ ...

Page 5

... 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. 5 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products ...

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