Integrated, 2-Channel, High-Brightness LED Driver

with High-Voltage Boost and SEPIC Controller

10 _____________________________________________________________________________________

Pin Description (continued)

PIN

NAME

FUNCTION

TQFN

TSSOP

16

19

DIM

Digital PWM Dimming Input

17

20

CS

Current-Sense Input. CS is the current-sense input for the switching regulator and is

also connected to the source of the internal power MOSFET. Connect a sense resistor

from CS to PGND to set the switching current limit.

18

1

DRAIN

Internal Switching MOSFET Drain Output

19

2

GATE

Internal Switching MOSFET Gate Input. Connect GATE to NDRV directly or through a

resistor to control the rise and fall times of the gate drive.

20

3

PGND

Power Ground. PGND is the high-switching current return path connection. Connect

SGND, LEDGND, and PGND at a single point.

—

—

EP

Exposed Pad. EP is internally connected to SGND. Connect EP to a large-area

contiguous ground plane for effective power dissipation. Connect EP to SGND.

Do not use as the only ground connection.