FAN6754_09 FAIRCHILD [Fairchild Semiconductor], FAN6754_09 Datasheet

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FAN6754_09

Manufacturer Part Number
FAN6754_09
Description
Highly Integrated Green- Mode PWM Controller
Manufacturer
FAIRCHILD [Fairchild Semiconductor]
Datasheet
1.FAN6754_09.pdf (14 pages)
© 2009 Fairchild Semiconductor Corporation
FAN6754 • Rev. 1.0.1
FAN6754
Highly Integrated Green- Mode PWM Controller
Brownout and V
Features
Applications
General-purpose switch-mode power supplies and
flyback power converters, including:
Ordering Information
FAN6754MRMY
FAN6754MLMY
Part Number
For Fairchild’s definition of Eco Status, please visit:
High-Voltage Startup
AC Input Brownout Protection with Hysteresis
Monitor HV to Adjust V
Low Operating Current: 1.7mA
Linearly Decreasing PWM Frequency to 22KHz
Frequency Hopping to Reduce EMI Emission
Fixed PWM Frequency: 65KHz
Peak-Current-Mode Control
Cycle-by-Cycle Current Limiting
Leading-Edge Blanking (LEB)
Internal Open-Loop Protection
GATE Output Maximum Voltage Clamp: 13V
V
V
Programmable Over-Temperature Protection (OTP)
Internal Latch Circuit (OVP, OTP)
Open-Loop Protection (OLP); Restart for MR, Latch
for ML
Built-in 8ms Soft-Start Function
Internal OTP Sensor with Hysteresis
Power Adapters
DD
DD
Under-Voltage Lockout (UVLO)
Over-Voltage Protection (OVP)
Limit
Temperature
Adjustment by HV Pin
-40 to +105°C
Operating
Limit
Range
Status
Green
Eco
http://www.fairchildsemi.com/company/green/rohs_green.html
8-Pin, Small Outline Package (SOP)
Description
The
provides several features to enhance the performance
of flyback converters. To minimize standby power
consumption,
provides off-time modulation to continuously decrease
the switching frequency under light-load conditions.
Under
FAN6754 saves PWM pulses by entering deep burst
mode. This burst mode function enables the power
supply to meet international power conservation
requirements.
FAN6754 integrates a frequency-hopping function
internally to reduce EMI emission of a power supply
with minimum line filters. Built-in synchronized slope
compensation is accomplished by proprietary HV
monitor to adjust V
over universal AC input range. Also, the gate output is
clamped at 13V to protect the external MOSFET from
over-voltage damage.
Other protection functions include AC input brownout
protection
protection. For over-temperature protection, an external
NTC thermistor can be applied to sense the external
switcher’s temperature. When V
activated, an internal latch circuit is used to latch-off the
controller. The latch mode is reset when the V
is removed.
FAN6754 is available in an 8-pin SOP package.
highly
zero-load
Package
with
integrated
a
hysteresis
proprietary
Limit
and
for constant output power limit
very
FAN6754
and
green-mode
light-load
DD
Packing Method
V
OVP or OTP are
PWM controller
DD
Tape & Reel
December 2009
over-voltage
www.fairchildsemi.com
conditions,
DD
function
.
supply

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FAN6754_09 Summary of contents

Page 1

FAN6754 Highly Integrated Green- Mode PWM Controller Brownout and V Adjustment by HV Pin Limit Features High-Voltage Startup AC Input Brownout Protection with Hysteresis Monitor HV to Adjust V Limit Low Operating Current: 1.7mA Linearly Decreasing PWM Frequency to 22KHz ...

Page 2

Application Diagram Internal Block Diagram © 2009 Fairchild Semiconductor Corporation FAN6754 • Rev. 1.0.1 Figure 1. Typical Application Figure 2. Functional Block Diagram 2 www.fairchildsemi.com ...

Page 3

Marking Information ZXYTT 6754MR TPM Pin Configuration Pin Definitions Pin # Name Description Ground. This pin is used for the ground potential of all the pins. A 0.1µF decoupling capacitor 1 GND placed between VDD and GND is recommended. Feedback. ...

Page 4

Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure ...

Page 5

Electrical Characteristics V =15V and T =25°C unless otherwise noted Symbol Parameter V Section DD V Continuously Operating Voltage OP V Start Threshold Voltage DD-ON V Minimum Operating Voltage DD-OFF V I Off Voltage DD-OLP DD-OLP Threshold Voltage ...

Page 6

Typical Performance Characteristics © 2009 Fairchild Semiconductor Corporation FAN6754 • Rev. 1.0.1 Figure 5. Brownout Circuit Figure 6. Brownout Behavior Figure 7. V and AC Recovery DD-AC 6 www.fairchildsemi.com ...

Page 7

Electrical Characteristics V =15V and T =25°C unless otherwise noted Symbol Parameter Oscillator Section f Frequency in Normal Mode OSC t Hopping Period HOP f Green-Mode Frequency OSC-G f Frequency Variation vs Frequency Variation vs. Temperature ...

Page 8

Electrical Characteristics V =15V and T =25°C unless otherwise noted Symbol Parameter Feedback Input Section Current-Sense Section t Delay to Output PD t Leading Edge Blanking Time LEB V Current Limit at Low Line (V Limit-L V Current ...

Page 9

Typical Performance Characteristics -40 -25 - Temperature (℃ ) Figure 9. Startup Current (I 18 17.5 17 16.5 16 15.5 15 -40 -25 - Temperature ...

Page 10

Typical Performance Characteristics 6 5.5 5 4.5 4 3.5 3 -40 -25 - Temperature (℃ ) Figure 17. FB Open-Loop Trigger Level (V vs. Temperature -40 -25 -10 ...

Page 11

Functional Description Startup Current For startup, the HV pin is connected to the line input through an external diode and resistor; R 150KΩ recommended). Peak startup current drawn from the HV pin × ...

Page 12

The HV pin can perform current limit to shrink the tolerance of OCP (Over-Current Protection) under full range of AC voltage, to linearly current limit curve as shown in Figure 25. FAN6754 also shrinks the V 2 level by half ...

Page 13

Physical Dimensions 8 6.20 5.80 1 PIN ONE INDICATOR (0.33) 0.25 0.10 1.75 MAX R0.10 R0.10 8° 0° 0.90 0.406 DETAIL A SCALE: 2:1 Figure 26. 8-Pin Small Outline Package (SOP) Package Package drawings are provided as a service to ...

Page 14

Fairchild Semiconductor Corporation FAN6754 • Rev. 1.0.1 14 www.fairchildsemi.com ...

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