1

6

5

10

2

3

7

4

8

9

RT/CLK

BOOT

PDIM

EN

VIN

TSENSE

PH

VSENSE

COMP

GND

TPS92510

www.ti.com

SLUSAE4A – JANUARY 2012 – REVISED JUNE 2012

DEVICE INFORMATION

TPS92510

MSOP-10

(Top View)

PIN FUNCTIONS

PIN

I/O

DESCRIPTION

NAME

NO.

A bootstrap capacitor is required between BOOT and PH. If the voltage on this capacitor is below the

BOOT

1

O

minimum required by the output device, the output is forced to switch off until the capacitor is refreshed.

Error amplifier output, and input to the output switch current comparator. Connect frequency compensation

COMP

8

O

components to this pin.

Enable pin, internal pull-up current source. Pull below 1.2-V to disable. Float to enable. Adjust the input

EN

3

I

undervoltage lockout with two resistors.

GND

9

–

Ground

PWM dimming input pin. The duty cycle of the PWM signal linearly controls the average current output of the

PDIM

4

I

converter.

PH

10

O

The source of the internal high-side MOSFET.

PowerPAD

Pad

–

GND pin must be electrically connected to the exposed pad on the printed circuit board for proper operation.

Resistor timing and external clock. An internal amplifier holds this pin at a fixed voltage when using an

external resistor to ground to program the switching frequency. If the pin is pulled above the PLL upper

RT/CLK

5

I

threshold, a mode change occurs and the pin becomes a synchronization input. The internal amplifier is

disabled and the pin becomes a high impedance clock input to the internal PLL. If the clocking edges stop,

the internal amplifier is re-enabled and the mode returns to the resistor-programmed function.

Temperature fold-back pin. An NTC thermistor connected from this pin to ground provides a thermal

TSENSE

6

I

feedback to decrease the average LED current as the sensed LED temperature increases. It is

recommended to bypass this pin with a capacitor with a value of 0.01 µF (or larger) to GND.

VIN

2

I

Input supply voltage, 3.5 V to 60 V.

VSENSE

7

I

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Product Folder Link(s): TPS92510