A1

A2

A3

B1

B3

C1

C3

D1

D2

D3

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

LM3502

SNVS339B – SEPTEMBER 2005 – REVISED MAY 2013

www.ti.com

DESCRIPTION (CONTINUED)

With no external compensation, cycle-by-cycle current limit, over-voltage protection, and under-voltage

protection, the LM3502 offers superior performance over other application specific standard product step-up

white LED drivers.

Connection Diagrams

Figure 2. TOP VIEW

Figure 3. TOP VIEW

10-Bump Thin DSBGA

16-Lead Thin WQFN

See Package Number (YPA0010)

See Package Number (RGH0016A)

PIN DESCRIPTIONS

Bump #

Pin #

Name

Description

A1

9

Cntrl

Shutdown Control Connection

B1

7

Fb

Feedback Voltage Connection

C1

6

Drain Connections of The NMOS and PMOS Field Effect Transistor (FET) Switches (Figure 4: N2

and P1)

D1

4

Over-Voltage Protection (OVP) and Source Connection of The PMOS FET Switch (Figure 4: P1)

D2

2 and 3

Sw

Drain Connection of The Power NMOS Switch (Figure 4: N1)

D3

15 and 16

PGND

Power Ground Connection

C3

14

AGND

Analog Ground Connection

B3

13

Supply or Input Voltage Connection

A3

12

En2

NMOS FET Switch Control Connection

A2

10

En1

PMOS FET Switch Control Connection

1

NC

No Connection

5

NC

No Connection

8

NC

No Connection

11

NC

No Connection

DAP

DAP

Die Attach Pad (DAP), must be soldered to the printed circuit board’s ground plane for enhanced

thermal dissipation.

Cntrl (Bump A1): Shutdown control pin

enter into shutdown mode operation. The LM3502 has an internal pull down resistor on the

Cntrl pin, thus the device is normally in the off state or shutdown mode of operation.

Fb (Bump B1): Output voltage feedback connection

The white LED string network current is set/programmed using a resistor from this pin to

ground.

2

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