FAN6300A Fairchild Semiconductor, FAN6300A Datasheet

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FAN6300A

Manufacturer Part Number
FAN6300A
Description
The highly integrated FAN6300A/H of PWM controller provides several features to enhance the performance of flyback converters
Manufacturer
Fairchild Semiconductor
Datasheet

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© 2009 Fairchild Semiconductor Corporation
FAN6300A/H • Rev. 1.0.1
FAN6300A / FAN6300H
Highly Integrated Quasi-Resonant Current Mode
PWM Controller
Features
Applications
High-Voltage Startup
Quasi-Resonant Operation
Cycle-by-Cycle Current Limiting
Peak-Current-Mode Control
Leading-Edge Blanking (LEB)
Internal Minimum t
Internal 5ms Soft-Start
Over Power Compensation
GATE Output Maximum Voltage
Auto-Recovery Over-Current Protection(FB Pin)
Auto-Recovery Open-Loop Protection(FB Pin)
VDD Pin and Output Voltage (DET Pin)
OVP Latched
Low Frequency Operation (below 100kHz) for
FAN6300A
High Frequency Operation (up to 190kHz) for
FAN6300H
AC/DC NB Adapters
Open-Frame SMPS
OFF
Description
The highly integrated FAN6300A/H of PWM controller
provides several features to enhance the performance
of flyback converters. FAN6300A is applied on quasi-
resonant flyback converters where maximum operating
frequency is below 100kHz. FAN6300H is suitable for
high-frequency operation (up to 190kHz). A built-in HV
startup circuit can provide more startup current to
reduce the startup time of the controller. Once the V
voltage exceeds the turn-on threshold voltage, the HV
startup function is disabled immediately to reduce
power consumption. An internal valley voltage detector
ensures power system operates at quasi-resonant
operation over a wide-range of line voltage and any
load conditions, as well as reducing switching loss to
minimize switching voltage on drain of power MOSFET.
To minimize standby power consumption and light-load
efficiency, a proprietary green-mode function provides
off-time modulation to decrease switching frequency
and perform extended valley voltage switching to keep
to a minimum switching voltage. The operating
frequency is limited by minimum t
to 8µs in FAN6300A and 13µs to 3µs in FAN6300H, so
FAN6300H can operate at higher switching frequency
than FAN6300A.
FAN6300A/H controller also provides many protection
functions. Pulse-by-pulse current limiting ensures the
fixed-peak current limit level, even when a short circuit
occurs. Once an open-circuit failure occurs in the
feedback loop, the internal protection circuit disables
PWM output immediately. As long as V
the turn-off threshold voltage, the controller also
disables PWM output. The gate output is clamped at
18V to protect the power MOS from high gate-source
voltage conditions. The minimum t
prevents the system frequency from being too high. If
the DET pin triggers OVP, internal OTP is triggered and
the power system enters latch-mode until AC power is
removed.
The FAN6300A/H controller is available in the 8-pin
Small Outline Package (SOP) and the Dual Inline
Package (DIP).
off
time, which is 38µs
December 2009
OFF
DD
www.fairchildsemi.com
drops below
time limit
DD

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FAN6300A Summary of contents

Page 1

... The operating frequency is limited by minimum t off to 8µs in FAN6300A and 13µs to 3µs in FAN6300H, so FAN6300H can operate at higher switching frequency than FAN6300A. FAN6300A/H controller also provides many protection functions. Pulse-by-pulse current limiting ensures the fixed-peak current limit level, even when a short circuit occurs ...

Page 2

... FAN6300ANY Green FAN6300HNY Green For Fairchild’s definition of Eco Status, please visit: Application Diagram © 2009 Fairchild Semiconductor Corporation FAN6300A(H) Rev. 1.0.1 Operating Temperature Range -40°C to +125°C 8-Lead, Small Outline Package (SOP) -40°C to +125°C 8-Lead, Small Outline Package (SOP) -40°C to +125°C 8-Lead, Dual In-line Package (DIP) -40° ...

Page 3

... Blanking Marking Information © 2009 Fairchild Semiconductor Corporation FAN6300A / FAN6300H • Rev. 1.0 OVP Latched OLP . µs Starter rent Lim ...

Page 4

... FB The input impedance of this pin is a 5kΩ equivalent resistance. A 1/3 attenuator connected between the FB and the PWM circuit is used for the loop-gain attenuation. FAN6300A/H performs an open-loop protection once the FB voltage is higher than a threshold voltage (around 4.2V) more than 55ms. Input to the comparator of the over-current protection. A resistor senses the switching current ...

Page 5

... The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol Parameter T Operating Ambient Temperature A © 2009 Fairchild Semiconductor Corporation FAN6300A / FAN6300H • Rev. 1.0.1 Min. -0.3 -0.3 SOP-8 DIP-8 -55 Conditions Min. ...

Page 6

... Zero Duty-Cycle Input Voltage OZ V Open Loop Protection Threshold Voltage FB-OLP Debounce Time for Open-Loop/Overload t D-OLP Protection t Internal Soft-Start Time SS © 2009 Fairchild Semiconductor Corporation FAN6300A / FAN6300H • Rev. 1.0.1 =10~25V, T =-40°C~125° Parameter Conditions GATE Open ...

Page 7

... Output Voltage Low OL V Output Voltage High OH t Rising Time R t Falling Time F V Gate Output Clamping Voltage CLAMP © 2009 Fairchild Semiconductor Corporation FAN6300A / FAN6300H • Rev. 1.0.1 (Continued) =10~25V, T =-40°C ~125° Conditions (3) V =0V DET I =-1mA DET ...

Page 8

... Delay Time once CS Pin Floating CS-H Internal Over-Temperature Protection Section T Internal Threshold Temperature for OTP OTP T Hysteresis Temperature for Internal OTP OTP-HYST Note: 3. Guaranteed by design. © 2009 Fairchild Semiconductor Corporation FAN6300A / FAN6300H • Rev. 1.0.1 (Continued) =10~25V, T =-40°C ~125° Conditions I < 74.41µA DET I =550µ ...

Page 9

... Temperature(°C) Figure 9. Operating Current 0.32 0.31 0.30 0.29 0.28 0.27 0.26 0.25 -40℃ -25℃ -10℃ 5℃ 20℃ 35℃ 50℃ 65℃ 80℃ 95℃ 110℃ 125℃ Temperature(°C) Figure 11. Leakage Current After Startup © 2009 Fairchild Semiconductor Corporation FAN6300A / FAN6300H • Rev. 1.0.1 10.00 9.80 9.60 9.40 9.20 9.00 -40℃ -40℃ ...

Page 10

... Figure 13. Comparator Reference Voltage 42.0 40.0 38.0 36.0 34.0 32.0 -40℃ -25℃ -10℃ 5℃ 20℃ 35℃ 50℃ 65℃ 80℃ 95℃ 110℃ 125℃ Temperature( Figure 15. Minimum Off Time (V © 2009 Fairchild Semiconductor Corporation FAN6300A / FAN6300H • Rev. 1.0.1 (Continued) = 25°C. A 8.70 8.40 8.10 7.80 7.50 -40℃ -25℃ -10℃ Figure 14. Minimum Off Time (V 2 ...

Page 11

... When the V voltage level reaches V DD the startup current switches off. At this moment, the V capacitor only supplies the FAN6300A/H to maintain V until the auxiliary winding of the main transformer provides the operating current. Valley Detection The DET pin is connected to an auxiliary winding of the ...

Page 12

... At fixed-load condition, the CS limit is higher when the value of R also affects the H/L line constant power limit. Figure 22. H/L Line Constant Power Limit Compensated by DET Pin © 2009 Fairchild Semiconductor Corporation FAN6300A / FAN6300H • Rev. 1.0.1 V Over-Voltage Protection DD V over-voltage protection prevents damage due to DD abnormal conditions ...

Page 13

... 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 FAN6300A / FAN6300H Rev. 1.0 1.75 4 ...

Page 14

... 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 FAN6300A / FAN6300H • Rev. 1.0.1 9.83 9.00 6.67 6.096 3 ...

Page 15

... Fairchild Semiconductor Corporation FAN6300A / FAN6300H • Rev. 1.0.1 15 www.fairchildsemi.com ...

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