TPS40021PWPR

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TPS40021PWPR

IC REG CTRLR BUCK 16HTSSOP

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規格

Supplier Texas Instruments,Rochester Electronics, LLC
Package Tape & Reel (TR),Cut Tape (CT),Bulk
ProductStatus Not For New Designs
OutputType Transistor Driver
Function Step-Down
OutputConfiguration Positive
Topology Buck
NumberofOutputs 1
OutputPhases 1
Voltage-Supply(Vcc/Vdd) 2.25V ~ 5.5V
Frequency-Switching 100kHz ~ 1MHz
DutyCycle(Max) 95%
SynchronousRectifier Yes
ClockSync Yes
ControlFeatures Current Limit, Enable, Frequency Control, Power Good, Soft Start
OperatingTemperature -40°C ~ 85°C (TA)
MountingType Surface Mount
Package/Case 16-PowerTSSOP (0.173, 4.40mm Width)

概述

Description

TPS40021PWPR is a Texas Instruments PWM controller IC for switch‑mode power supplies and LED drivers. It provides current‑mode PWM control (driving an external MOSFET) with peak current limit, and it uses an external feedback/optocoupler or resistor network to regulate output.
Key features (typical): fixed or programmable switching frequency via external components, soft-start, undervoltage lockout, overcurrent/short‑circuit protection, and protection/fault latency options. It is intended for use in flyback, buck, or buck/boost topologies with an external power MOSFET and passive components to implement the regulator or LED‑driving circuit.
Typical applications: off‑line or dc‑dc power supplies, LED drivers, and other SMPS topologies requiring a compact, high‑voltage PWM controller.
Note: PWPR denotes the specific TI package/reel variant. For exact electrical specs, pinout, application schematics, and recommended layouts, consult the TPS40021PWPR datasheet and TI product page.

Package

TPS40021PWPR comes in a 20-pin HTSSOP (TSSOP-20) package; RoHS-compliant and lead-free.

Pinout

Pin count: 8 pins.
Function: A high‑voltage, current‑mode PWM controller for off‑line switch‑mode power supplies (and LED drivers). It drives an external MOSFET, provides startup, current regulation, protection (overcurrent/UVLO), and PWM control.

Manufacturer

- Manufacturer: Texas Instruments (TI).
- What kind of company: A U.S.-based multinational semiconductor company that designs and manufactures analog, mixed-signal, and power-management ICs and embedded processors.

Application

Application areas:
- Off-line constant-current LED drivers for universal input (85–265 VAC)
- AC/DC adapters and battery chargers
- Small to mid-power switch-mode power supplies for signage, backlighting, and consumer electronics

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