High-Performance, Single-Ended, Current-Mode

PWM Controllers

10

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Pin Descriptions (continued)

PIN

MAX5095A/

MAX5095B

MAX5095C

NAME

FUNCTION

1

1

COMP

Current Limit/PWM Comparator Input. COMP is level-shifted and connected to the

inverting input of the PWM comparator. Pull up COMP to REF through a resistor and

connect an optocoupler from COMP to GND for proper operation.

2

—

SYNC

Bidirectional Synchronization Input. When synchronizing with other

MAX5095A/MAX5095Bs, the higher frequency part synchronizes all other devices.

—2

ADV_CLK

Advance Clock Output. ADV_CLK is an 85ns clock output pulse preceding the rising

edge of OUT (see Figure 4). Use the pulse to drive the secondary-side synchronous

rectifiers through a pulse transformer or an optocoupler (see Figure 8).

33

CS

PWM Comparator/Overcurrent Protection Comparator Input. The current-sense signal is

compared to the level shifted voltage at COMP.

44

5

5

GND

minimize ground loops.

6

6

OUT

MOSFET Driver Output. OUT connects to the gate of the external n-channel MOSFET.

77

combination of a 0.1µF and a higher value ceramic capacitor.

8

8

REF

5V Reference Output. Bypass REF to GND with a 0.1µF ceramic capacitor or a parallel

combination of a 0.1µF and a higher value ceramic capacitor no larger than 4.7µF.

MAX5095_