FAN6753 Fairchild Semiconductor, FAN6753 Datasheet

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FAN6753

Manufacturer Part Number
FAN6753
Description
The highly integrated FAN6753 PWM controller provides several features to enhance the performance of flyback converters
Manufacturer
Fairchild Semiconductor
Datasheet

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Part Number
Manufacturer
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Part Number:
FAN6753MY
Manufacturer:
FAIRCHILD
Quantity:
117
© 2009 Fairchild Semiconductor Corporation
FAN6753 • Rev. 1.0.3
FAN6753
Highly Integrated Green-Mode PWM Controller
Features
Applications
General-purpose switch-mode power supplies and
flyback power converters, including:
Ordering Information
Part Number
FAN6753MY
High-Voltage Startup
Low Operating Current: 2.7mA
Adaptive Decreasing PWM Frequency to 22KHz
Built-in Full-Range Frequency Hopping to Reduce
EMI Emission
Fixed PWM Frequency: 65KHz
Peak-Current-Mode Control
Cycle-by-Cycle Current Limiting
Leading-Edge Blanking (LEB)
Synchronized Slope Compensation
Internal Auto-Recovery Open-Loop Protection
GATE Output Maximum Voltage Clamp: 18V
V
V
Auto Recovery / Latch for Option
Internal Auto-Recovery Sense Short-Circuit
Protection for Option
Constant Power Limit (Full AC Input Range)
Internal OTP Sensor with Hysteresis
Built-in 5ms Soft-Start Function
Built-in LATCH Pin Pull HIGH (> 5.2V)
Latch Function
Power Adapters
Open-Frame SMPS
DD
DD
Under-Voltage Lockout (UVLO)
Over-Voltage Protection (OVP),
Temperature Range
-40C to +105C
Operating
8-Lead, Small Outline Package
Package
Description
The highly integrated FAN6753 PWM controller provides
several features to enhance the performance of flyback
converters.
To minimize standby power consumption, a proprietary
adaptive
modulation at light-load conditions. To avoid acoustic-
noise problems, the minimum PWM frequency is set
above 22KHz. This green-mode function enables the
power supply to meet international power conservation
requirements. With the internal high-voltage startup
circuitry, the power loss due to bleeding resistors is also
eliminated. To further reduce power consumption,
FAN6753 is manufactured using the BiCMOS process,
which allows an operating current of only 2.7mA.
FAN6753 integrates a full-range frequency-hopping
function internally that helps reduce EMI emission of a
power supply with minimum line filters. Its built-in
synchronized slope compensation achieves stable peak-
current-mode control. The proprietary internal line
compensation ensures constant output power limit over
a wide AC input voltage range, from 90V
FAN6753 provides many protection functions. In
addition to cycle-by-cycle current limiting, the internal
open-loop protection circuit ensures safety should an
open-loop or output short-circuit failure occur. PWM
output is disabled until V
limit, when the controller starts up again. As long as V
exceeds ~26V, the internal OVP circuit is triggered.
Available in the 8-pin SOP package.
green-mode
DD
function
drops below the UVLO lower
Packing Method
Tape & Reel
provides
AC
February 2011
to 264V
www.fairchildsemi.com
frequency
AC
.
DD

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FAN6753 Summary of contents

Page 1

... With the internal high-voltage startup circuitry, the power loss due to bleeding resistors is also eliminated. To further reduce power consumption, FAN6753 is manufactured using the BiCMOS process, which allows an operating current of only 2.7mA. FAN6753 integrates a full-range frequency-hopping function internally that helps reduce EMI emission of a power supply with minimum line filters ...

Page 2

... NC No connection For startup, this pin is pulled HIGH to the line input or bulk capacitor via resistors. © 2009 Fairchild Semiconductor Corporation FAN6753 • Rev. 1.0.3 F: Fairchild Logo Z: Plant Code X: 1-Digit Year Code Y: 1-Digit Week Code TT: 2-Digit Die Run Code T: Package Type (M:SOP) ...

Page 3

... Application Diagram Internal Block Diagram © 2009 Fairchild Semiconductor Corporation FAN6753 • Rev. 1.0.3 Figure 3. Typical Application Figure 4. Functional Block Diagram 3 www.fairchildsemi.com ...

Page 4

... All voltage values, except differential voltages, are given with respect to the network ground terminal. 2. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device © 2009 Fairchild Semiconductor Corporation FAN6753 • Rev. 1.0.3 Parameter (1, 2) <50°C) A Human Body Model, ...

Page 5

... OSC t Hopping Period Green-Mode Frequency OSC-G f Frequency Variation vs Frequency Variation vs. Temperature f DT Deviation PWM Frequency f OSC f OSC-G © 2009 Fairchild Semiconductor Corporation FAN6753 • Rev. 1.0.3 Conditions V – 0.16V DD-ON V =15V, GATE Open DD V +0.1V TH-OLP V =90V (V =120V =0V DD HV=500V +1V ...

Page 6

... When activated, the output is disabled and the latch is turned off. 4. The threshold temperature for enabling the output again and resetting the latch, after over-temperature protection has been activated. © 2009 Fairchild Semiconductor Corporation FAN6753 • Rev. 1.0.3 (Continued) Conditions V > 5.2V, after LATCHth 100µ ...

Page 7

... Figure 10. Supply Current Drawn from HV Pin (I vs. Temperature -40 -30 - Temperature (℃) Figure 12. Frequency in Normal Mode (f vs. Temperature © 2009 Fairchild Semiconductor Corporation FAN6753 • Rev. 1.0 100 125 -40 Figure 7. Operation Supply Current (I ) vs. Temperature DD-ST 12 ...

Page 8

... Temperature (℃) Figure 18. V Over-Voltage Protection (V DD vs. Temperature © 2009 Fairchild Semiconductor Corporation FAN6753 • Rev. 1.0 ℃ 75 ℃ 85 ℃ 100 ℃ 125 ℃ -40 ℃ ) Figure 15. Delay Time of FB Pin Open-Loop ...

Page 9

... External Latch Function (LATCH Pin) The LATCH pin can be used to control the FAN6753 entering latch mode by pulling this pin over 5.2V for 100µs. If floating, the LATCH pin is internally pulled HIGH to 3.5V not recommended to float or short the LATCH pin to GND ...

Page 10

... Slope compensation helps alleviate this problem. Good placement and layout practices should be followed. Avoiding long PCB traces and component leads, locating compensation and filter components near the FAN6753, and increasing the is charged up to the DD power MOS gate resistance also improve performance. ...

Page 11

... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/. © 2009 Fairchild Semiconductor Corporation FAN6753 • Rev. 1.0.3 5.00 4.80 A 3.81 ...

Page 12

... Fairchild Semiconductor Corporation FAN6753 • Rev. 1.0.3 12 www.fairchildsemi.com ...

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