FAN6753 Fairchild Semiconductor, FAN6753 Datasheet - Page 2

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

© 2009 Fairchild Semiconductor Corporation
FAN6753 • Rev. 1.0.3
Marking Information
Pin Configuration
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
SENSE
LATCH
Name Description
GATE
GND
V
NC
HV
FB
DD
For external latch circuit used. When V
GND is recommended. Internal has a sourcing current of 100µA (I
voltage on this pin is 1V (under V
The signal from the external compensation circuit is fed into this pin. The PWM duty cycle is
determined in response to the signal on this pin and the current-sense signal on the SENSE pin.
Current sense. The sensed voltage is used for peak-current-mode control and cycle-by-cycle
current limiting.
Ground.
The totem-pole output driver. Soft-driving waveform is implemented for improved EMI.
Power supply. The internal protection circuit disables PWM output as long as V
OVP trigger point.
No connection.
For startup, this pin is pulled HIGH to the line input or bulk capacitor via resistors.
ZXYTT
6753
TPM
Figure 2. Pin Configuration (Top View)
SENSE
LATCH
GND
FB
Figure 1. Top Mark
1
2
3
4
LATCHth
2
LATCHth
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)
P: Y=Green Package
M: Manufacture Flow Code
8
7
6
5
=5.2V).
> 5.2V and after 100µs, IC is latched off. 10KΩ to
HV
NC
V
GATE
DD
LATCH
), 100µA ×10KΩ. The
DD
exceeds the
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