Fairchild FSEZ1016A Data Handbook
Summary
The FSEZ1016A is a high-efficiency, primary-side PWM integrated power MOSFET designed for advanced power supply applications. This component simplifies circuit design by providing accurate Constant Voltage (CV) and Constant Current (CC) regulation while eliminating the need for secondary feedback circuitry. The comprehensive manual details key features such as green-mode operation for low standby power, cycle-by-cycle current limiting, and multiple protection mechanisms. It is ideally suited for electrical engineers designing compact, reliable solutions like cellular battery chargers, smart LED drivers, or replacing traditional linear transformers and SMPS units.
Page 1 Text Content
FSEZ1016A Prim ary-Side-R egulation PW Integrated Pow er M SFET
January 2010
FSEZ1016A Primary-Side-Regulation PWM Integrated Power MOSFET Features Description
Constant-Voltage (CV) and Constant-Current (CC) This primary-side PWM integrated power MOSFET significantly simplifies power supply designs that require
Control without Secondary-Feedback Circuitry
CV and CC regulation capabilities. FSEZ1016A controls
Accurate Constant Current Achieved by Fairchild’s
the output voltage and current precisely with only the
Proprietary TRUECURRENT™ Technique
information in the primary side of the power supply, not Green Mode: Frequency Reduction at Light-Load only removing the output current sensing loss, but also eliminating all secondary feedback circuitry.
Fixed PWM Frequency at 43k Hz with Frequency
Hopping to Reduce EMI The green-mode function with a low startup current (10µA) maximizes the light-load efficiency so the power
Low Startup Current: 10μA Maximum
supply can meet stringent standby power regulations.
Low Operating Current: 3.5m A
Compared with conventional secondary-side regulation Peak-Current-Mode Control in CV Mode approach; the FSEZ1016A can reduce total cost, component count, size, and weight; while
Cycle-by-Cycle Current Limiting
simultaneously increasing efficiency, productivity, and Over-Temperature Protection (OTP) system reliability.
with Auto-Restart
FSEZ1016A is available in a 7-pin SOIC package.
Brownout Protection with Auto-Restart
A typical output CV/CC characteristic envelope is shown VDD Over-Voltage Protection (OVP) with in Figure 1.
Auto-Restart VDD Under-Voltage Lockout (UVLO) SOIC-7 Package
Applications Battery Chargers for Cellular Phones, Cordless Phones, PDAs, Digital Cameras, Power Tools Replaces Linear Transformer and RCC SMPS Offline High Brightness (HB) LED Drivers
Related Resources
Figure 1. Typical Output V-I Characteristic
AN-6067 Design Guide for FAN100/102 and FSEZ1016A/1216
Ordering Information
Operating
MOSFET MOSFET Eco
Part Number Temperature Package Packing
BVDSS RDS(ON) Status Method
Range
7-Lead, Small Outline
FSEZ1016AMY -40°C to +125°C 600V 9.3Ω Integrated Circuit Tape & Reel
(Typical) Green
Package (SOIC)
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FSEZ1016A • Rev. 1.0.2
Page Summary Contents For Fairchild FSEZ1016A Data Handbook
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 16 |
| File Size | 571.36 KB |
| Published | June 16, 2026 |
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Frequently Asked Questions
How does the FSEZ1016A simplify power supply designs?
It allows for Constant-Voltage (CV) and Constant-Current (CC) regulation without needing secondary-feedback circuitry.
What kinds of electrical protections are provided by this MOSFET?
The device includes Over-Temperature Protection (OTP), Brownout Protection, V Over-Voltage Protection (OVP), and V Under-Voltage Lockout (UVLO).
Can the FSEZ1016A replace older power components?
Yes, it can be used to replace linear transformers and traditional RCC SMPS units.
What is the maximum standby efficiency feature?
The Green Mode function reduces frequency at low loads (light-load) to maximize power efficiency and meet stringent regulations.