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What is FAN302UL?

This electronic component, produced by the manufacturer "Fairchild Semiconductor", performs the same function as "PWM Controller".


FAN302UL Datasheet PDF - Fairchild Semiconductor

Part Number FAN302UL
Description PWM Controller
Manufacturers Fairchild Semiconductor 
Logo Fairchild Semiconductor Logo 


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May 2012
FAN302UL
PWM Controller for Low Standby Power Battery-
Charger Applications — mWSaver™ Technology
Features
mWSaver™ Technology Provides
Best-in-Class Standby Power
Achieves <10mW, Far Below Energy Star’s 5-Star
Level (<30mW).
Proprietary 500V High-Voltage JFET Startup
Reduces Startup Resistor Loss
Low Operation Current in Burst Mode:
350µA Maximum
Constant-Current (CC) Control without Secondary-
Side Feedback Circuitry
Fixed PWM Frequency at 140kHz with Frequency
Hopping to Reduce EMI
High-Voltage Startup
Low Operating Current: 3.5mA
Peak-Current-Mode Control with Slope
Compensation
Cycle-by-Cycle Current Limiting
VDD Over-Voltage Protection (Auto-Restart)
VS Over-Voltage Protection (Latch Mode)
VDD Under-Voltage Lockout (UVLO)
Gate Output Maximum Voltage Clamped at 15V
Fixed Over-Temperature Protection (Latch Mode)
Available in an 8-Lead SOIC Package
Applications
Battery chargers for cellular phones, cordless phones,
PDA, digital cameras, and power tools. Replaces linear
transformers and RCC SMPS.
Description
Advanced PWM controller FAN302UL significantly
simplifies isolated power supply designs that require
Constant Current (CC) regulation of the output. The
output current is precisely estimated with information in
the primary side of the transformer and controlled with
an internal compensation circuit, not only removing the
output current sensing loss, but also eliminating external
CC control circuitry. A Green-Mode function with an
extremely low operating current (200µA) in Burst Mode
maximizes light-load efficiency, enabling conformance
to worldwide Standby Mode efficiency guidelines.
Integrated protections include two-level pulse-by-pulse
current limit, Over-Voltage Protection (OVP), brownout
protection, and Over-Temperature Protection (OTP).
Compared with a conventional approach using external
control circuit in the secondary side for CC regulation;
the FAN302UL reduces total cost, component count,
size, and weight, while simultaneously increasing
efficiency, productivity, and system reliability.
VO Maximum
Typical
Minimum
IO
Figure 1. Typical Output V-I Characteristic
Ordering Information
Part Number
FAN302ULMY
Operating
Temperature Range
-40°C to +105°C
Package
8-Lead, Small-Outline Integrated Circuit (SOIC),
JEDEC MS-012, .150-Inch Narrow Body
Packing
Method
Tape & Reel
© 2011 Fairchild Semiconductor Corporation
FAN302UL • Rev. 1.0.3
www.fairchildsemi.com

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FAN302UL equivalent
Electrical Characteristics
VDD=15V and TA=25°C unless noted.
Symbol
Parameter
HV Section
VHV-MIN Minimum Startup Voltage on HV Pin
IHV Supply Current Drawn from HV Pin
IHV-LC Leakage Current Drawn from HV Pin
VDD Section
VDD-ON Turn-On Threshold Voltage
VDD-OFF Turn-Off Threshold Voltage
VDD-LH Threshold Voltage for Latch-Off Release
IDD-ST Startup Current
IDD-OP Operating Supply Current
IDD-BURST Burst-Mode Operating Supply Current
VDD-OVP VDD Over-Voltage Protection Level
tD-VDDOVP VDD Over-Voltage Protection Debounce Time
Oscillator Section
fOSC Frequency
Center Frequency
Hopping Range
fOSC-CM-MIN
Minimum Frequency by Continuous Conduction
Mode (CCM) Prevention Circuit(4)
fOSC-CCM Minimum Frequency in (CC) Regulation
Feedback Input Section
AV Internal Voltage Scale-Down Ratio of FB Pin(5)
ZFB FB Pin Input Impedance
VFB-OPEN FB Pin Pull-Up Voltage
VFB-L FB Threshold to Disable Gate Drive in Burst Mode
VFB-H FB Threshold to Enable Gate Drive in Burst Mode
Over-Temperature Protection Section
TOTP
Threshold Temperature for Over-Temperature
Protection(6)
Condition
Min. Typ. Max. Unit
VHV=100V, VDD=0V,
Controller Off
VHV=500V, VDD=15V
(Controller On with
Auxiliary Supply)
50 V
0.8 1.5 5.0 mA
0.8 3.0 μA
VDD Rising
VDD Falling
VDD Falling
VDD=VDD-ON – 0.16V
VDD=18V, f=fOSC, CL=1nF
VDD=8V, CL=1nF
f=140kHz
15 16 17
4.7 5.0 5.3
2.50
400 450
3.5 4.0
200 350
25.0 26.5 28.0
100 180
V
V
V
μA
mA
μA
V
μs
VCS=5V, VS=2.5, VFB=5V
VCS=5V, VS=0V
135 140 145
kHz
±5
17 22 27 kHz
40 45 50 kHz
1/3.5 1/3.0 1/2.5
38 42 44
FB Pin Open
5.3
VFB Falling,VCS=5V, VS=0V 1.0 1.1 1.2
VFB Rising,VCS=5V, VS=0V 1.05 1.15 1.25
V/V
k
V
V
V
+130 +140 +150 °C
Continued on the following page…
© 2011 Fairchild Semiconductor Corporation
FAN302UL • Rev. 1.0.3
5
www.fairchildsemi.com


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Part Details

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Part NumberDescriptionMFRS
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