TS1518CX5 Taiwan Semiconductor, TS1518CX5 Datasheet

TS1518CX5

Manufacturer Part Number

TS1518CX5

Description

LED Lighting Drivers White LED driver

Manufacturer

Taiwan Semiconductor

Datasheet

1.TS1518CX5.pdf (7 pages)

Specifications of TS1518CX5

Rohs

yes

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

TS1518CX5-RF

Manufacturer:

SEMICON

Quantity:

20 000

Current page: 1 of 7
Download datasheet (349Kb)

General Description

The TS1518 is a step-up DC-DC converter; operates as current source to drive up to 6 white LEDs(V

LEDs(V

resulting in uniform brightness and eliminating the need for ballast resistors. The light intensity of these LEDs is

proportional to the current passing through them. The TS1518 switches at a fixed frequency of ~930KHz, allowing the

use of tiny, low profile inductors and capacitors to minimize footprint and cost in space consideration applications for

cellular phone backlighting or other hand held equipment. The TS1518 can drive up to 9 white LEDs from a single Li-

Ion battery. The wide input voltage range from 2.7V to 7V is ideal for portable with higher conversion efficiency. To

control LED brightness, the LED current can be pulsed by applying a PWM (pulse width modulated) signal with a

frequency range of 100Hz to 1KHz to the CTRL pin.

TS1518 has integrated Latched Over Voltage Protection that prevents damage to the device in case of a high

impedance output due to faulty LED or open circuit caused by abnormal conditions.

Features

●

Typical Application Circuit

Built-in Internal Switch

PWM dimming control 100Hz to 1KHz

Analog dimming control

2.7V to 7V input range

<1uA shutdown current

Internal Soft Start

Drives up to 9 White LEDs (V

Over Voltage Protection 34V

100mV Low Reference Voltage

SOT-25

at 3.5V) or 9 LEDs(V

Pin Definition:

1. SW

2. Ground

3. Feedback

4. CTRL

5. Input

at 3.5V) in series. Series connecting of the LEDs provides identical LED currents

at 3.5V)

Step-Up DC-DC Converter, White LED Driver

1/7

Application

●

Ordering Information

TS1518CX5 RF

Cellular Phones

Digital Still Cameras

Portable Electronics

LCD Display Module

White LED Backlighting

PDAs, GPS terminals

Part No.

Package

SOT-25

3Kpcs / 7” Reel

Packing

TS1518

Version: B07

at 3.0V) or 8

Related parts for TS1518CX5

TS1518CX5 Summary of contents

Page 1

... Series connecting of the LEDs provides identical LED currents Application ● Cellular Phones ● Digital Still Cameras ● Portable Electronics ● LCD Display Module ● White LED Backlighting ● PDAs, GPS terminals at 3.5V) Ordering Information Part No. TS1518CX5 RF 1/7 TS1518 at 3.0V Package Packing SOT-25 3Kpcs / 7” Reel Version: B07 ...

Page 2

Absolute Maximum Rating Parameter Input Voltage Supply Voltage (Recommended) FB Voltage SW Voltage CTRL Voltage Ambient Temperature Range Junction Temperature Range Electrical Specifications ( Function Parameter Input Voltage Range Quiescent Current (Not Switching) Quiescent Current (Shutdown) Feedback Voltage ...

Page 3

Functional Block Pin Description Pin Function Ground 3 Feedback 4 CTRL 5 Input Step-Up DC-DC Converter, White LED Driver Description Switching Pin. This is the collector of the internal NPN power switch. Connect to inductor and diode. ...

Page 4

Application Information Operation The TS1518 uses a constant frequency, current mode control scheme to regulate the output LED current. Its operation can be understood by referring to the block diagram in Figure 3. At the start of each oscillator cycle, ...

Page 5

Application Information (Continue) LED Current and Dimming Control The LED’s current is set by a resistor connected at FB pin to GND using: 100 LED R LED The maximum LED current set initially can be reduced by ...

Page 6

Step-Up DC-DC Converter, White LED Driver SOT-25 Mechanical Drawing DIM A+ Ө1 S1 6/7 TS1518 SOT-25 DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX. 0.09 1.25 0.0354 0.0492 0.30 0.50 0.0118 0.0197 0.09 0.25 ...

Page 7

Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No ...

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