LED Driver PR4101

PIN Configurations / PIN Descriptions

Test

PwrDwn

1

2

3

4

5

6

14

13

12

11

10

9

7

8

Delay

PWM

GND

RTK

Temp

Vsense

NDRV

VDI

Vcc

SUB

5VHi

5VLo

PR4101A: Package SOP14

Topside marking: version code "PR4101"

RTK

GND

1

2

3

4

8

7

6

5

Vsense

NDRV

VDI

Vcc

5VHi

5VLo

PR4101B: Package SOP8

Topside marking: version code "PR4101B"

Pin No.

PR4101A

Pin No.

PR4101B Pin Name

Pin Function Description

1

n.c.

Test

For test and internal use only

2

n.c.

When connected to GND, NDRV is clamped to GND.

3

n.c.

Delay

Not connected: Delay Start is disabled

connected to GND: Delay Start is enabled

4

n.c.

PWM

If V

If V

5

2

GND

Ground

6

2

SUB

Substrate has to be connected to GND for PR4101A (internally connected to GND

for PR4101B)

7

3

5VHi

Internal 5V linear regulator output for high currents. Connect a capacitor of 100

nF to GND. Voltage is not for external use.

8

4

5VLo

Internal 5V linear regulator output for low currents. Connect a capacitor of

100 nF to GND. Voltage is not for external use.

9

5

Vcc

Supply voltage

10

6

VDI

Undervoltage detection pin. If unused, connect to Vcc.

For use with phase fired controllers (see application notes).

11

7

NDRV

Gate connection for an external n-channel MOSFET.

12

8

VSense

Feedback for controlling the output current. Connect this pin to the series

13

n.c.

Temp

Voltage output of the internal chip temperature sensor (over temperature

14

1

RTK

Softstart feature and temperature compensation of the output current. By

connecting for example a NTC resistor from RTK to GND the sensing threshold

voltage Vsense will be decreased depending on the NTC´s temperature. A

© PREMA Semiconductor GmbH 2006-2014 I rev. 1014

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