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LM3503SQ-35 数据表(PDF) 2 Page - Texas Instruments

部件名 LM3503SQ-35
功能描述  Dual-Display Constant Current LED Driver with Analog Brightness Control
Download  28 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM3503SQ-35 数据表(HTML) 2 Page - Texas Instruments

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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
LM3503
SNVS329E – JULY 2005 – REVISED MAY 2013
www.ti.com
DESCRIPTION (CONTINUED)
With no external compensation, cycle-by-cycle current limit, output over-voltage protection, input under-voltage
protection, and dynamic white LED current control capability, the LM3503 offers superior performance over other
step-up white LED drivers.
Connection Diagram
Figure 1. 10-Bump Thin DSBGA Package
Figure 2. 16-Lead Thin WQFN Package
(YPA0010) (Top View)
(RGH0016A) (Top View)
PIN DESCRIPTIONS
Bump #
Pin #
Name
Description
A1
9
Cntrl
White LED Current Control Connection
B1
7
Fb
Feedback Voltage Connection
C1
6
VOUT2
Drain Connections of the NMOS and PMOS Field Effect Transistor (FET) Switches (Figure 3: N2 and
P1). Connect 100nF at VOUT2 node if VOUT2 is not used
D1
4
VOUT1
Over-Voltage Protection (OVP) and Source Connection of the PMOS FET Switch (Figure 3: P1)
D2
2 and 3
Sw
Drain Connection of the Power NMOS Switch (Figure 3: N1)
D3
15 and 16
Pgnd
Power Ground Connection
C3
14
Agnd
Analog Ground Connection
B3
13
VIN
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), to be soldered to the printed circuit board’s ground plane for enhanced
thermal dissipation.
Cntrl (Bump A1): White LED current control pin. Use this pin to control the feedback voltage with an external
DC voltage.
Fb (Bump B1):Output voltage feedback connection.
VOUT2 (Bump C1):Drain connections of the internal PMOS and NMOS FET switches (Figure 3: P1 and N2). It is
recommended to connect 100nF at VOUT2 if VOUT2 is not used for LM3503-35V & LM3503-44V versions.
VOUT1(Bump D1):
Source connection of the internal PMOS FET switch (Figure 3: P1) and OVP sensing node. The output capacitor
must be connected as close to the device as possible, between the VOUT1 pin and ground plane. Also connect
the Schottky diode as close as possible to the VOUT1 pin to minimize trace resistance and EMI radiation.
Sw (Bump D2):
2
Submit Documentation Feedback
Copyright © 2005–2013, Texas Instruments Incorporated
Product Folder Links: LM3503


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