Connection Diagram

18-Bump Thin Micro SMD Package, Large Bump

NS Package Number TLA18

20127902

Pin Description

Pin #s

Pin Names

Pin Descriptions

C1

V

IN

Input voltage. Input range: 2.7V to 5.5V.

D2

GND

Ground

A3

P

OUT

Charge pump output. Approximately 1.5xV

IN

A1, B2, A5, E1

C1+, C1-, C2+,

C2-

Flying capacitor connections.

D6, E5, D4, E3

D1A, D2A, D3A,

D4A

LED Outputs - Group A

C5, B4, C3

D1B, D2B, D3B

LED Outputs - Group B

B6

EN-A

Enable for Group-A LEDs (current outputs). Logic input.

High = Group-A LEDs ON. Low = Group A LEDs OFF.

Pulsing this pin with a PWM signal (100Hz-1kHz) can be used to dim LEDs.

A7

EN-B

Enable for Group-B LEDs (current outputs). Logic input.

High = Group-B LEDs ON. Low = Group B LEDs OFF.

Pulsing this pin with a PWM signal (100Hz-1kHz) can be used to dim LEDs.

E7

I

SETA

Placing a resistor (R

Group A LEDs. LED Current = 100 x (1.25V ÷ R

C7

I

SETB

Placing a resistor (R

Group B LEDs. LED Current = 100 x (1.25V ÷ R

Operational States

ENA

ENB

Mode of Operation

L

L

Shutdown

H

L

Enabled. Group A LEDs ON. Group B LEDs OFF

L

H

Enabled. Group B LEDs ON. Group A LEDs OFF

H

H

Invalid for normal operation

Ordering Information

Order Information

Package

Supplied As

LM27961TL

TLA18 Micro SMD

250 Units, Tape & Reel

LM27961TLX

3000 Units, Tape & Reel

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