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FAN302UL の電気的特性と機能

FAN302ULのメーカーはFairchild Semiconductorです、この部品の機能は「PWM Controller」です。


製品の詳細 ( Datasheet PDF )

部品番号 FAN302UL
部品説明 PWM Controller
メーカ Fairchild Semiconductor
ロゴ Fairchild Semiconductor ロゴ 




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FAN302UL Datasheet, FAN302UL PDF,ピン配置, 機能
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

1 Page





FAN302UL pdf, ピン配列
Marking Information
Pin Configuration
F- Fairchild Logo
Z: Assembly Plant Code
X: Year Code
Y: Week Code
TT: Die Run Code
T: M=SOP
P: Y= Green Package
M: Manufacture Flow Code
Figure 4.Top Mark
Figure 5. Pin Assignments
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
Name
CS
GATE
VDD
VS
GND
FB
NC
HV
Description
Current Sense. This pin connects a current-sense resistor to detect the MOSFET current for
Peak-Current-Mode control for output regulation. The current-sense information is also used to
estimate the output current for CC regulation.
PWM Signal Output. This pin has an internal totem-pole output driver to drive the power
MOSFET. It is internally clamped at 15V.
Power Supply. IC operating current and MOSFET driving current are supplied through this pin.
This pin is typically connected to an external VDD capacitor.
Voltage Sense. This pin detects the output voltage information and diode current discharge
time based on voltage of the auxiliary winding.
Ground
Feedback. Typically, an Opto-Coupler is connected to this pin to provide feedback information
to the internal PWM comparator. This feedback is used to control the duty cycle in CV
regulation.
No Connect
High Voltage. This pin connects to the DC bus for high-voltage startup.
© 2011 Fairchild Semiconductor Corporation
FAN302UL • Rev. 1.0.3
3
www.fairchildsemi.com


3Pages


FAN302UL 電子部品, 半導体
Electrical Characteristics (Continued)
VDD=15V and TA=25°C unless noted.
Symbol
Parameter
Condition
Min. Typ. Max. Unit
Voltage-Sense Section
ITC Bias Current
VS Sampling Voltage to Switch to the Second
VVS-CM-MIN
Pulse-by-Pulse Current Limit in Power Limit
Mode(6)
VCS=5V
8.75 10.00 11.25 μA
0.55 V
VVS-CM-MAX
VS Sampling Voltage to
Normal Pulse-by-Pulse
Switch Back to
Current Limit(6)
the
0.75 V
VSN-CC
VS Sampling Voltage to Start Frequency
Decreasing in CC Mode
VCS=5V, fS1=fOSC-2KHz
2.15 V
VSG-CC
VS Sampling Voltage to End Frequency
Decreasing in CC Mode
VCS=5V, fS2=fOSC-CCM
+2KHz
0.70 V
SG-CC
Frequency Decreasing Slope of CC Regulation
SG-CC= (fS1-fS2)
/(VSN-CC-VSG-CC)
52 64 76 kHz/V
IVS-UVP
Sinking Current Threshold for Brownout
Protection(6)
VVS-OFFSET ZCD Comparator Internal Offset Voltage(6)
VVS-OVP
Output Over-Voltage Protection with VS Sampling
Voltage
47 μA
200 mV
2.80 2.85 V
tVS-OVP Output Over-Voltage Protection Debounce Time f=140kHz
60 120 μs
Current-Sense Section
VVR Internal Reference Voltage for CC Regulation
2.475 2.500 2.525 V
VCCR
Variation Test Voltage on CS Pin for CC Output
(Non-Inverting Input of Error Amplifier for CC
Regulation)
VCS=0.41V
2.405 2.430 2.455 V
VSTH Normal Current Limit Threshold Voltage
0.7 V
VSTH-VA
Second Current Limit Threshold Voltage at Power
Limit Mode (Vs<VVS-CM-MAX)
VVS=0.3V
0.25 0.30 0.35 V
tPD
tMIN
tLEB
VSLOPE
GATE Output Turn-Off Delay
Minimum On Time
Leading-Edge Blanking Time(6)
Slope Compensation(6)
100 150
VCS=5V, VVS=2.5, VFB=5V
(Test Mode)
180
250
320
100 150 200
Maximum Duty Cycle
0.3
ns
ns
ns
V
GATE Section
DCYMAX Maximum Duty Cycle
VGATE-L Output Voltage Low
VDD=25V, IO=10mA
61 64 67 %
1.5 V
VGATE-H Output Voltage High
VGATE-H Output Voltage High
VDD=8V, IO=1mA
VDD=5.5V, IO=1mA
5
4.0
8V
5.5 V
tr Rising Time
tf Falling Time
VDD=15V, CL=1nF
VDD=15V, CL=1nF
100 140 180
30 50 70
ns
ns
VGATE- Gate Output Clamping Voltage
CLAMP
VDD=25V
13 15 17 V
Notes:
4. fOSC-CM-MIN occurs when the power unit enters CCM operation.
5. AV is a scale-down ratio of the internal voltage divider of the FB pin.
6. Not tested; guaranteed by design.
© 2011 Fairchild Semiconductor Corporation
FAN302UL • Rev. 1.0.3
6
www.fairchildsemi.com

6 Page



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部品番号部品説明メーカ
FAN302UL

PWM Controller

Fairchild Semiconductor
Fairchild Semiconductor


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