FSDM07652RB
Pin Definitions
Pin Configuration
Figure 3. Pin Configuration (Top View)
Pin Number
Pin Name
Pin Function Description
1
Drain
This pin is the high voltage power Sense FET drain. It is designed to drive the
transformer directly.
2
GND
This pin is the control ground and the Sense FET source.
3
Vcc
This pin is the positive supply voltage input. During start up, the power is sup-
plied by an internal high voltage current source that is connected to the Vstr pin.
When Vcc reaches 12V, the internal high voltage current source is disabled and
the power is supplied from the auxiliary transformer winding.
4
Vfb
This pin is internally connected to the inverting input of the PWM comparator.
The collector of an opto-coupler is typically tied to this pin. For stable operation,
a capacitor should be placed between this pin and GND. If the voltage of this pin
reaches 6.0V, the over load protection is activated resulting in shutdown of the
FPS
TM
.
5
N.C
-
6
Vstr
This pin is connected directly to the high voltage DC link. At startup, the internal
high voltage current source supplies internal bias and charges the external ca-
pacitor that is connected to the Vcc pin. Once Vcc reaches 12V, the internal cur-
rent source is disabled.
6.Vstr
5.N.C.
4.Vfb
3.Vcc
2.GND
1.Drain
TO-220F-6L
53
Summary of Contents for DW9937S
Page 1: ...SERVICE MANUAL DW9937S Ver 0 0 ...
Page 3: ...1 ...
Page 4: ...2 ...
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Page 7: ...EXPLODED VIEW 5 5 ...
Page 15: ...14 13 ...
Page 16: ...15 14 ...
Page 17: ...16 15 ...
Page 18: ...17 IS2 16 ...
Page 22: ...MITSUMI I2 C BUS Control 5 Input 2 Output AV Switch MM1313 Equivalent Block Diagram 20 ...
Page 70: ...FSDM07652RB Package Dimensions TO 220F 6L Forming 68 ...
Page 74: ...72 ...
Page 75: ...11 Terminal for External Connection Outline Drawing 73 ...
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