TS2581

PWM Controller

1/7

Version: A11

SOP-8

General Description

The TS2581 integrates Pulse-Width-Modulation (PWM) control circuit into a single chip, mainly designs for power-

supply regulator. All the functions include an error amplifier, a soft-start, UVLO, OVP, SCP, TSD circuitry.

This device features an internal 100KHz oscillator, the UVLO makes sure that the outputs are off until the internal

circuit operates normally.

Features

●

Input voltage：8V to 40V

●

Duty ratio：0% to 100% PWM control

●

Oscillation frequency：100K/300KHz

●

Thermal Shutdown function.

●

Short Circuit Protect (SCP).

●

External SW P-channel MOS.

●

External OVP setting function.

●

Current mode non-synchronous PWM converter

●

External current limit setting.

●

Under voltage Lockout.

Ordering Information

Part No.

Package

Packing

TS2581CS RLG

SOP-8

2.5kpcs / 13” Reel

Note: “G” denotes for Halogen Free

Application

●

Simple High-efficiency Step down Regulator

●

Charger

●

Telecommunication

Absolute Maximum Rating

Parameter

Symbol

Limit

Unit

VIN Pin Voltage

GND - 0.3 to GND + 45

V

VGATE,ISENSE Pin Voltage

V

Feedback, OVP, EN/CT Pin Voltage

GND - 0.3 to 6

V

Switch Pin Voltage

V

Power Dissipation

PD

W

Storage Temperature Range

-40 to +165

°C

Operating Temperature Range

-20 to +125

°C

Operating Supply Voltage

+8.5 to +40

V

Thermal Information

Parameter

Symbol

Maximum

Unit

Thermal Resistance (Junction to Case)

Ө

JC

15

Thermal Resistance (Junction to Ambient)

Ө

JA

40

2

Pin Definition:

1. EN/CT

8. FB

2. GND

7. OVP

5. GATE