IFB

VDD

1

2

3

4

5

6

7

8

OVP

IDRV

GDRV

PGND

EN

AGND

FSW

COMP

VIN

16

15

14

13

12

11

10

9

PWM

REF

UVLO

FAULT

ISNS

TPS61197

www.ti.com

SLVSC25 – JULY 2013

DEVICE INFORMATION

SOIC-16 (D)

(TOP VIEW)

PIN FUNCTIONS

PIN

DESCRIPTION

NO. (D)

NAME

1

UVLO

Low input voltage lockout. Use a resister divider from VIN to this pin to set the UVLO threshold

Device enable and disable control input. EN pin high voltage enables the device. EN pin low voltage disables the

2

EN

device.

3

PWM

PWM dimming signal input. The frequency of the PWM signal is in the range of 90Hz to 22 kHz

4

AGND

Analog ground

5

REF

Internal reference voltage for the boost converter. Use a capacitor at this pin to adjust the soft start time.

6

COMP

Loop compensation for the boost converter. Connect a RC network to make loop stable

7

IFB

Connecting a resistor to the pin programs the LED current level for full brightness (i.e., 100% dimming)

8

IDRV

PWM dimming output control pin to drive the external MOSFET or bipolar transistor

9

ISNS

External switch MOSFET current sense positive input

Over-voltage protection detection input. Connect a resistor divider from output to this pin to program the OVP

10

OVP

threshold. In addition, this pin is also the feedback of the output voltage of the boost converter.

11

PGND

External MOSFET current sense ground input

12

GDRV

Gate driver output for the external switch MOSFET

13

VDD

Internal regulator output for IC power supply. Connect a ceramic capacitor of more than 1.0µF to this pin.

14

FSW

Boost switching frequency setting pin. Use a resistor to set the frequency between 50 kHz to 800 kHz.

15

FAULT

Fault indicator. Open-drain output. Output high impedance when fault conditions happen

16

VIN

Power supply input pin

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Product Folder Links: TPS61197