FAN6863R Fairchild Semiconductor, FAN6863R Datasheet

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FAN6863R

Manufacturer Part Number
FAN6863R
Description
A highly integrated PWM controller, FAN6863 provides several features to enhance the performance of flyback converters
Manufacturer
Fairchild Semiconductor
Datasheet
© 2011 Fairchild Semiconductor Corporation
FAN6863 • Rev. 1.0.1
FAN6863
Highly Integrated Green-Mode PWM Controller
Features
Applications
General-purpose switched-mode power supplies and
flyback power converters, including:
Ordering Information
FAN6863TY
FAN6863LTY
FAN6863RTY
Part Number
Low Standby Power: Under 0.1W
Low Startup Current: 8µA
Low Operating Current at Green Mode: 600µA
Peak-Current Mode Operation with Cycle-by-Cycle
Current Limiting
PWM Frequency Continuously Decreasing with
Burst Mode at Light Loads
V
Constant Output Power Limit (Full AC Input Range)
Internal Latch Circuit (FAN6863L) for OVP, OTP
SENSE Pin Short-Circuit Protection (SSCP)
Fixed PWM Frequency (65KHz) with Frequency
Hopping
Feedback Open-Loop Protection: 60ms Delay
GATE Output Maximum Voltage Clamp: 13.5V
Soft-Start Time: 5ms
Soft Driving for EMI Improvement
Full Range Frequency Hopping
Internal OTP Sensor with Hysteresis
GATE Driving Capability: 400mA
Power Adapters
Open-Frame SMPS
SMPS with Surge-Current Output, such as for
Printers, Scanners, Motor Drivers
DD
Over-Voltage Protection (OVP)
Temperature Range
-40 to +105°C
Operating
6-Lead, SuperSOT™-6, JEDEC M0-193,
1.6mm Wide
Description
A highly integrated PWM controller, FAN6863 provides
several features to enhance the performance of flyback
converters. To minimize standby power consumption, a
proprietary Green Mode provides off-time modulation to
continuously decrease the switching frequency under
light-load conditions. Under zero-load conditions, the
power supply enters Burst Mode, which completely
shuts off PWM output. Output restarts just before the
supply voltage drops below the UVLO lower limit. Green
Mode enables power supplies to meet international
power conservation requirements.
The FAN6863 is designed for SMPS and integrates a
frequency-hopping function that helps reduce EMI
emission of a power supply with minimum line filters.
The built-in synchronized slope compensation provides
proprietary sawtooth compensation for constant output
power limit over universal AC input range. The gate
output is clamped at 13.5V to protect the external
MOSFET from over-voltage damage.
Other protection functions include SENSE pin Short-
Circuit Protection (SSCP), V
(OVP), and Over-Temperature Protection (OTP). For
OTP, an external NTC thermistor can be applied to
sense the ambient temperature. When V
is activated, an internal latch circuit latches off the
controller. Protection types shown in Table 1.
Table 1. Protection Type
FAN6863R
FAN6863L
Number
FAN6863
Part
Package
Latch
Latch
OVP
A/R
Latch
OLP
DD
A/R
A/R
Over-Voltage Protection
Packing Method
OTP /
OTP2
Latch
Latch
A/R
Tape & Reel
DD
May 2011
www.fairchildsemi.com
OVP or OTP
SSCP
A/R
A/R
A/R

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FAN6863R Summary of contents

Page 1

... When V is activated, an internal latch circuit latches off the controller. Protection types shown in Table 1. Table 1. Protection Type Part OVP Number FAN6863 Latch FAN6863L Latch FAN6863R A/R Package 6-Lead, SuperSOT™-6, JEDEC M0-193, 1.6mm Wide May 2011 Over-Voltage Protection DD OVP or OTP DD OTP / ...

Page 2

... Typical Application Block Diagram © 2011 Fairchild Semiconductor Corporation FAN6863 • Rev. 1.0.1 Figure 1. Typical Application Figure 2. Block Diagram 2 www.fairchildsemi.com ...

Page 3

... This pin senses the voltage across a resistor. When the voltage reaches the internal threshold, PWM output is disabled and this activates over-current protection. This pin also provides current amplitude information for Current- Mode control. 3 ABR: FAN6863TY ABF: FAN6863RTY ABG: FAN6863LTY Wafer Lot Code : Year Code Week Code ...

Page 4

... 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 T Operating Ambient Temperature A © 2011 Fairchild Semiconductor Corporation FAN6863 • Rev. 1.0.1 Parameter Parameter 4 Min. Max. ...

Page 5

... Fairchild Semiconductor Corporation FAN6863 • Rev. 1.0.1 Condition Min – 0.16V DD- 20V Gate Open 15V, DD FB-ZDC V < FB-ZDC FAN6863L-Latch, FAN6863R-Auto 21.5 Restart V = 5V; FAN6863, DD FAN6863L Only 1/4.0 5.2 4.3 FB > V FB-OLP, t < 2.5µ -40 to +105° > FB-OLP t < 2.5µ -40 to +105° ...

Page 6

... FB Threshold Voltage for Zero-Duty FB-ZDC V - FB-ZDCR ZDC Hysteresis V FB-ZDC f Frequency Variation vs Frequency Variation vs. Temperature f DT Deviation PWM Frequency f OSC f OSC-G V FB-ZDC © 2011 Fairchild Semiconductor Corporation FAN6863 • Rev. 1.0.1 (Continued) Condition Center Frequency V > FB-N  FB-N Hopping Range FB-G  FB-N V ...

Page 7

... 8V 50mA DD O GATE = 1nF GATE = 1nF V = 20V 15V 15V DD FAN6863, FAN6863L- Latch, FAN6863R-Auto Restart, at 25° FB-N FAN6863, FAN6863L- Latch, FAN6863R-Auto Restart, at 25°C (1) (2) 7 Min. Typ. Max. Unit 150 200 12.0 13.5 15.0 V 400 mA ...

Page 8

... Typical Performance Characteristics Figure 6. Turn-On Threshold Voltage (V vs. Temperature Figure 8. Operating Current (I Figure 10. Center Frequency (f © 2011 Fairchild Semiconductor Corporation FAN6863 • Rev. 1.0.1 ) Figure 7. Turn-Off Threshold Voltage (V DD-ON ) vs. Temperature Figure 9. V DD-OP ) vs. Temperature Figure 11. FB Threshold Voltage for Frequency OSC 8 DD-OFF vs. Temperature ...

Page 9

... Figure 12. FB Voltage at f OSC-G Figure 14. Open-Loop Protection Delay (t vs. Temperature Figure 16. Valley Threshold Voltage for Current Limit (V ) vs. Temperature STHVA © 2011 Fairchild Semiconductor Corporation FAN6863 • Rev. 1.0.1 (Continued vs. Temperature Figure 13. Threshold Voltage for Open-Loop FB-G ) Figure 15. Flat Threshold Voltage for Current Limit D-OLP Figure 17 ...

Page 10

... Typical Performance Characteristics Figure 18. Maximum Duty Cycle (DCY vs. Temperature Figure 20. Leading-Edge Blanking Time (t vs. Temperature Figure 22. Falling Time (t © 2011 Fairchild Semiconductor Corporation FAN6863 • Rev. 1.0.1 (Continued) ) Figure 19. Threshold Voltage for SENSE Short-Circuit MAX ) Figure 21. Rising Time (t LEB ) vs. Temperature Figure 23. Internal Resistor from RT Pin (R ...

Page 11

... Once V rises above V FB FB-ZDC Burst Mode alternately enables and disables switching, thereby reducing switching loss in Standby Mode, as shown in Figure 26. © 2011 Fairchild Semiconductor Corporation FAN6863 • Rev. 1.0.1 capacitor DD DD Frequency Hopping ...

Page 12

... The other threshold is for the over-current protection, which shuts down the MOSFET gate when the sensing voltage of MOSFET drain current is above the threshold longer than the shutdown delay (60ms). © 2011 Fairchild Semiconductor Corporation FAN6863 • Rev. 1.0.1 Open-Loop / Overload Protection (OLP) Over-Voltage ...

Page 13

... Low standby (pin<0.1W at no-load condition)  Soft-start time: 5ms 230V 50Hz (89.92% Avg.) AC 115V 60Hz (88.75% Avg.) AC 85.29% (Energy Star V2.0) © 2011 Fairchild Semiconductor Corporation FAN6863 • Rev. 1.0.0 Fairchild Devices Input Voltage Range FAN6863 Figure 30. Measured Efficiency and Power Saving Figure 31. Schematic of Typical Application Circuit 13 Output 90~265V 19V/2 ...

Page 14

... Fly- Fly Primary-Side Inductance Primary-Side Effective Leakage © 2011 Fairchild Semiconductor Corporation FAN6863 • Rev. 1.0.1 Figure 32. Transformer Wire Ts 0.25 • 0.25 • COPPER SHIELD 1.2 0.5 • COPPER SHIELD 1.2 0.25 • CORE ROUNDING TAPE Pin Specification 3- ...

Page 15

... Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. 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’ ...

Page 16

... Fairchild Semiconductor Corporation FAN6863 • Rev. 1.0.1 16 www.fairchildsemi.com ...

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