L5107

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

2 of 9

www.unisonic.com.tw

QW-R125-026.A

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PIN CONFIGURATION

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PIN DESCRIPTION

PIN NO.

PIN NAME

DESCRIPTION

1

NC

No Connection.

2

Power Input Pin. The external voltage supply is connected to this pin. A 4.7µF/50V

capacitor must be connected across this pin and GND.

3

EN

Enable Control Pin. Pull high to turn on. A 100kΩ resistor can be connected across this

pin and VIN.

4

PWMD

Dimming PWM Control Pin. Logic High terminates the output power. Logic Low starts

up the output power.

5

COMP

Error Amp Output Pin. A 10nF capacitor must be connected across this pin and GND

for external compensation.

6

IADJ

Output Feedback Pin. The reference is 0.25V.

7

FS

Timing Resistance Connection Pin. Connected to a Resistor to determine the operating

frequency.

8

AGND

Analog Ground.

9

NC

No Connection.

10

SYNC

Frequency Synchronize Pin. The UTC L5107 can be Connected together by this pin to

synchronize multiple converters.

11

IS

Current Sense Pin. Connected to external current sense resistor which in turn is

connected to the source of the external FET as well as an external slope compensation

resistor.

12

OVP

OVP Divider Connect Pin. Connect the top of the divider string to the output. If the load

is disconnected, the output voltage will rise until OVP reaches 1.25V and then will

regulate around this point.

13

PGND

Power Ground.

14

DRV

Drive Output. Connect to the gate of external FET.

15

VDD Filter Connect Pin. Connect a 10μF/10V capacitor to GND. It is also the positive

supply for the Driver. Do not connect an external load to this pin.

16

NC

No Connect.

EPAD

Connect to AGND.