TS19377 Datasheet, PDF (1/7 Pages) Taiwan Semiconductor Company, Ltd – 2A Buck (Step-down) WLED Driver

TS19377
2A Buck (Step-down) WLED Driver
SOP-8
Pin Definition:
1. FB
8. GND
2. EN
7. GND
3. Comp 6. SW
4. Vcc
5. SW
General Description
TS19377 consists of step-down switching regulator with PWM control. These devise include a reference voltage
source, oscillation circuit, error amplifier, internal PMOS and etc.
TS19377 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control
circuit is able to the duty ratio linearly from 0 up to 100%. An enable function, an over current protect function and
short circuit protect function are built inside, and when OCP or SCP happens, the operation frequency will be
reduced. Also, an internal compensation block is built in to minimum external component count.
With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode connected externally, these
ICs can function as step-down switching regulators. They serve as ideal power supply units for portable devices
when coupled with the SOP-8 package, providing such outstanding features as low current consumption. Since
this converter can accommodate an input voltage up to 23V, it is also suitable for the operation via an AC adapter.
Features
● Input Voltage Range 3.6V~23V
● Output voltage: 0.25V~Vcc
● 2A Switch Output Current
● Duty ratio: 0%~100% PWM control
● 330kHz Switching Frequency
● Enable/Disable Functions
● Current limit and Thermal Shutdown
● Short Circuit Protections
● Built-in Internal SW P-CH MOS
Block Diagram
SW
Application
● White LED Backlighting
● White LED Driving
● Multiple LED Driving
● LED Lighting Equipment
Ordering Information
Part No.
Package
Packing
TS19377CS RLG
SOP-8 2.5Kpcs / 13” Reel
Note: “G” denotes Halogen Free Product.
Vcc
Oscillator
Circuit
Reference Voltage
Thermal
Shutdown
PWMSwitched
Control Circuit
Current
V_EN ^Limit
+
-
FB
Vss
EN
Comp
1/7
Version: A11