FSEZ1216 Datasheet, PDF (1/14 Pages) Fairchild Semiconductor – Primary-Side-Regulation PWM Integrated Power MOSFET

September 2008
FSEZ1216 — Primary-Side-Regulation PWM Integrated
Power MOSFET
Features
ƒ Constant-Voltage (CV) and Constant-Current (CC)
Control without Secondary-Feedback Circuitry
ƒ Green-Mode Function: PWM Frequency Linearly
Decreasing
ƒ Fixed PWM Frequency at 42kHz with Frequency
Hopping to Solve EMI Problem
ƒ Cable Compensation in CV Mode
ƒ Low Startup Current: 10μA
ƒ Low Operating Current: 3.5mA
ƒ Peak-Current-Mode Control in CV Mode
ƒ Cycle-by-Cycle Current Limiting
ƒ VDD Over-Voltage Protection with Auto-Restart
ƒ VDD Under-Voltage Lockout (UVLO)
ƒ Fixed Over-Temperature Protection with Latch
ƒ DIP-8 Package Available
Applications
ƒ Battery chargers for cellular phones, cordless
phones, PDA, digital cameras, power tools
ƒ Replaces linear transformer and RCC SMPS
Description
This highly integrated PWM controller, FSEZ1216,
provides several features to enhance the performance
of low-power flyback converters. The proprietary
topology of FSEZ1216 enables simplified circuit design
for battery charger applications. A low-cost, smaller, and
lighter charger results when compared to a conventional
design or a linear transformer. The startup current is
only 10µA, which allows use of large startup resistance
for further power saving.
To minimize the standby power consumption, the
proprietary green-mode function provides off-time
modulation to linearly decrease PWM frequency under
light-load conditions. This green-mode function assists
the power supply in meeting power conservation
requirements.
Using FSEZ1216, a charger can be implemented with
few external components and minimized cost. A typical
output CV/CC characteristic is shown in Figure 1.
FSEZ1216 controller is available in an 8-pin DIP package.
Figure 1. Typical Output V-I Characteristic
Ordering Information
Part Number
Operating
Temperature Range
Eco
Status
Package
Packing
Method
FSEZ1216NY
-40°C to +105°C
Green 8-Lead, Dual Inline Package (DIP-8)
Tube
For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
© 2008 Fairchild Semiconductor Corporation
FSEZ1216 • Rev. 1.0.0
www.fairchildsemi.com