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CS3845BGDR8 Datasheet(PDF) 3 Page - ON Semiconductor

Part # CS3845BGDR8
Description  Current Mode PWM Control Circuit
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CS3845BGDR8 Datasheet(HTML) 3 Page - ON Semiconductor

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3
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Electrical Characteristics: continued
Package Pin Description
PACKAGE PIN #
PIN SYMBOL
FUNCTION
8L PDIP & SO
14L SO
1
1
COMP
Error amp output, used to compensate error amplifier
23
VFB
Error amp inverting input
3
5
Sense
Noninverting input in Current Sense Comparator
4
7
OSC
Oscillator timing network with Capacitor to Gnd, resistor
to VREF
5
9
Gnd
Ground
610
VOUT
Output drive pin
712
VCC
Positive power supply
814
VREF
Output of 5V internal reference
8
Pwr Gnd
Output driver Gnd
11
VCC Pwr
Output driver positive supply
2, 4, 6, 13
NC
No Connection
s Total Standby Current
Start-Up Current
300
500
µA
Operating Supply Current
VFB = VSense = 0V RT = 10kΩ, CT = 3.3nF
11
17
mA
VCC Zener Voltage
ICC=25mA
34
V
s PWM Section
Maximum Duty Cycle
46
48
50
%
Minimum Duty Cycle
0%
s Under-Voltage Lockout Section
Start Threshold
7.8
8.4
9.0
V
Min. Operating Voltage
After Turn On
7.0
7.6
8.2
V
Notes:
1. These parameters, although guaranteed, are not 100% test-
ed in production.
2. Parameter measured at trip point of latch with VFB=0
3. Gain defined as: A =
; 0
≤ V
Sense ≤ 0.8V.
∆V
COMP
∆V
Sense


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