WS2259
Pin Function Description
Pin
Pin No.
Pin Type
Function Description
Name
DIP8/SOT23
GATE
1 / 6
2 / 5
3
Output
Totem-pole gate drive output for the power MOSFET
VDD
NC
Power
Power Supply
Floating
Floating
Current
Monitoring
Frequency
Setting
Current sense input.
SENSE
4 / 4
Internal oscillator frequency setting pin. A resistor which is
connected between RI and GND sets the PWM frequency
Floating
RI
5 / 3
6
NC
FB
Floating
Feedback
Input
Feedback input pin. The PWM duty cycle is determined by voltage into
this pin and the current-sense signal at Pin 4
Ground
7 / 2
8 / 1
GND
Ground
Block Diagram
O S C
Soft
driver
Logic
V D D
clamp
Soft
Start
O C P
L E B
Slope
compensation
UVLO
P W M
Voltage
Divider
Internal
Supply
O L P
Burst
Mode
3/11
Steady, keep you advance
WINSEMI [ SHENZHEN WINSEMI MICROELECTRONICS CO., LTD ]
