TPD1052F

2012-01-20

2

Block Diagram

Pin Description

Pin No.

Symbol

Function

1

VDD

Power supply pin.

2, 7

N.C

No-Connect pin.

3

IN

Input pin. The IN pin has an internal pull-down resistor.

Even if the IN pin is open, the output will not accidentally turn on.

4

GND

Ground pin.

5

MASK

Overcurrent detection/protection is IOC(clamp) in the Mask time.

If the capacitor and the resistance is not connected to MASK pin, overcurrent protection is IOC(duty).

6

DIAG

Self-diagnosis detection pin. npn open collector.

When Input is “H”(Output on), and Overcurrent or Overtemperature is detected, DIAG becomes low

level and it is latched.

When input is low level, the state of latch is reseted.

8

OUT

Output pin. When a load short-circuit causes an overcurrent (0.8A Min) to flow into a device, output

current is limited in order to protect the IC.

OUT

5V regulator

Driver

Overcurrent

Detection

Overtemperature

Detection

DIAG

GND

IN

Diagnosis Logic

Logic

MASK

Mask time

IN

12V

5V