OB2269C
Current Mode PWM Controller
Frequency Shuffling
Marking Information
TERMINAL ASSIGNMENTS
Pin Num
1
2
3
4
5
6
7
8
Pin Name
GND
FB
VIN
RI
RT
SENSE
VDD
GATE
I/O
P
I
I
I
I
I
P
O
On
-
Br
ig
h
©On-Bright Electronics
-3-
t
Co
nf
id
e
Description
Ground
Feedback input pin. PWM duty cycle is determined by voltage level into this
pin and current-sense signal level at Pin 6.
Connected through a large value resistor to rectified line input for Startup IC
supply and line voltage sensing.
Internal Oscillator frequency setting pin. A resistor connected between RI
and GND sets the PWM frequency.
Temperature sensing input pin. Connected through a NTC resistor to GND.
Current sense input pin. Connected to MOSFET current sensing resistor
node.
DC power supply pin.
Totem-pole gate drive output for power MOSFET.
nt
ia
l
to
Ly
co
n
(志
Confidential
OB_DOC_DS_69CC1
恒
通
电
子
)
ETC [ ETC ]
