FAN302UL Fairchild Semiconductor, FAN302UL Datasheet

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FAN302UL

Manufacturer Part Number
FAN302UL
Description
This highly integrated PWM controller provides several features to enhance the performance of flyback converters
Manufacturer
Fairchild Semiconductor
Datasheet

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© 2011 Fairchild Semiconductor Corporation
FAN302UL • Rev. 1.0.2
FAN302UL
PWM Controller for Low Standby Power Battery-
Charger Applications — mWSaver™ Technology
Features
Applications
Battery chargers for cellular phones, cordless phones,
PDA, digital cameras, and power tools. Replaces linear
transformers and RCC SMPS.
Ordering Information
Part Number
FAN302ULMY
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
V
V
V
Gate Output Maximum Voltage Clamped at 15V
Fixed Over-Temperature Protection (Latch Mode)
Available in an 8-Lead SOIC Package
DD
S
DD
Over-Voltage Protection (Latch Mode)
Over-Voltage Protection (Auto-Restart)
Under-Voltage Lockout (UVLO)
Temperature Range
-40C to +105C
Operating
8-Lead, Small-Outline Integrated Circuit (SOIC),
JEDEC MS-012, .150-Inch Narrow Body
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.
V
O
Figure 1. Typical Output V-I Characteristic
Package
December 2011
Tape & Reel
www.fairchildsemi.com
Packing
Method
I
O
Maximum
Typical
Minimum

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FAN302UL Summary of contents

Page 1

... 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 Figure 1 ...

Page 2

... Application Diagram Internal Block Diagram © 2011 Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 Figure 2. Typical Application Figure 3. Functional Block Diagram 2 www.fairchildsemi.com ...

Page 3

... NC No Connect 8 HV High Voltage. This pin connects to the DC bus for high-voltage startup. © 2011 Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 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 ...

Page 4

... All voltage values, except differential voltages, are given with respect to the GND pin. 2. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. 3. EDS ratings including the HV pin: HBM=500V, CDM=750V. © 2011 Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 Parameter (1,2) =25C) A Human Body Model, ...

Page 5

... FB Threshold to Disable Gate Drive in Burst Mode Threshold to Enable Gate Drive in Burst Mode FB H Over-Temperature Protection Section Threshold Temperature for Over-Temperature T (6) OTP Protection © 2011 Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 V =100V Controller Off V =500V (Controller On with Auxiliary Supply ...

Page 6

... CCM operation. OSC-CM-MIN scale-down ratio of the internal voltage divider of the FB pin Not tested; guaranteed by design. © 2011 Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 (Continued) V =5V CS (6) V =5V =5V ...

Page 7

... Turn-On Threshold Voltage (V DD vs. Temperature Figure 8. Operating Current (I Figure 10. CC Regulation Minimum Frequency (f ) vs. Temperature OSC-CCM © 2011 Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 ) Figure 7. V DD-ON ) vs. Temperature Figure 9. Burst Mode Operating Current (I DD-OP Figure 11. Enter Zero Duty Cycle of FB Voltage (V 7 Turn-Off Threshold Voltage (V ...

Page 8

... Typical Performance Characteristics Figure 12. Leave Zero Duty Cycle of FB Voltage (V ) vs. Temperature FB-H Figure 14. Reference Voltage vs. Temperature Figure 16. Starting Voltage of Frequency Decreasing of CC Regulation (V SN-CC © 2011 Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 2.95 2.90 2.85 2.80 2.75 2.70 2.65 -40 Figure 13 Figure 15. Variation Voltage on CS Pin for CC VR Figure 17 ...

Page 9

... Typical Performance Characteristics Figure 18. Threshold Voltage for Current Limit (V vs. Temperature Figure 20. Minimum On Time (t Figure 22. Maximum Duty Cycle (DCY vs. Temperature © 2011 Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 ) Figure 19. Threshold Voltage for Current Limit at STH Power Mode (V ) vs. Temperature Figure 21.Leading-Edge Blanking Time (t ...

Page 10

... EA.I shown in Figure 25. During CV regulation, V determines the duty cycle while V HIGH. During CC regulation mode, V duty cycle while V is saturated to HIGH. EA.V Figure 24. Internal PWM Control Circuit © 2011 Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 V SAW Gate PWM.V signal. Then, EA.V PWM.I OSC CLK ) CCR Figure 25 ...

Page 11

... To prevent this CCM operation and maintain good output current estimation in DCM, FAN302UL decreases switching frequency as output voltage drops, as shown in Figure 28 and Figure 29. FAN302UL indirectly monitors the output voltage by the sample-and-hold voltage ( which is taken at 85% of diode current discharge ...

Page 12

... Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 High-Voltage (HV) Startup Figure 33 shows the high-voltage startup circuit for FAN302UL applications. Internally a JFET is used to implement the high-voltage current source, whose characteristics are shown in Figure 34. Technically, the HV pin can be directly connected to the DC link (V However, to improve reliability and surge immunity the ZCD is not typical to use about 100kΩ ...

Page 13

... Burst Mode alternately enables and disables switching of the MOSFET, reducing the switching losses in Standby Mode. Once FAN302UL enters Burst Mode, the operating current is reduced from 3.5mA to 200μA to minimize power consumption in Burst Mode. © 2011 Fairchild Semiconductor Corporation FAN302UL • ...

Page 14

... Minimum On Time Modulation Brownout Protection FAN302UL modulates the minimum ON time of the MOSFET such that it reduces as input voltage increases, as shown Figure 40. This allows smaller minimum ON time for high-line condition, ensuring Burst Mode operation occurs at almost the same power level, regardless of line voltage variation. The minimum ON time is also related to the bundle frequency of Burst Mode operation ...

Page 15

... FAN302UL has two test mode, depending on the voltage level at the CS pin and the VS pin. When the voltage the at the CS pin is greater than 3.5V, FAN302UL enters Test Mode 1. Test Mode 1 disables OCP, OTP, and frequency-hopping functions. This test mode is used to measure the V through the FB pin, I ...

Page 16

... Output Regulation: CV:±5%, CC:±15% 80.0 90Vac 78.0 76.0 74.0 72.0 70.0 68.0 66 Load Figure 42.Measured Efficiency and Output Regulation © 2011 Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 Input Voltage Range FAN302UL 90~265V (Pin=6.3mW for 115V AC 115Vac 230Vac 264Vac 75 100 Figure 43.Schematic of Typical Application Circuit 16 Output 5V/1.2A (6W) AC and Pin=7 ...

Page 17

... Transformer Winding Specifications Table 1. Terminal No. Start Pin Fly+ Primary-Side Inductance Primary-Side Effective Leakage Inductance © 2011 Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 (Continued) Figure 44.Transformer Wire End Pin 2 2UEW 0.15*2 5 2UEW 0.12*1 Fly- TEX-E 0.4*1 Pin Specifications 4-5 530H ±7% 4- ...

Page 18

... 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/. © 2011 Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 5.00 4.80 A 3.81 ...

Page 19

... Fairchild Semiconductor Corporation FAN302UL • Rev. 1.0.2 19 www.fairchildsemi.com ...

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