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CS3845GDWR16 数据表(PDF) 3 Page - Cherry Semiconductor Corporation

部件名 CS3845GDWR16
功能描述  Current Mode PWM Control Circuit with 50% Max Duty Cycle
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制造商  CHERRY [Cherry Semiconductor Corporation]
网页  http://www.cherrycorp.com/
标志 CHERRY - Cherry Semiconductor Corporation

CS3845GDWR16 数据表(HTML) 3 Page - Cherry Semiconductor Corporation

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CS2844/CS2845
CS3844/CS3845
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX UNITS
CS2844
CS3844
CS2845/CS3845
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX MIN
TYP
MAX UNITS
Notes:
1. Adjust Vcc above the start threshold before setting at 15V.
3. Parameter measured at trip point of latch with VFB=0.
2.These parameters, although guaranteed, are not 100% tested in production.
4. Gain defined as:
A =
; 0 ≤ VSense ≤ 0.8V.
∆VCOMP
∆VSense
s
Under-Voltage Lockout Section
Start Threshold
15
16
17
14.5
16
17.5
7.8
8.4
9.0
V
Min. Operating
After Turn On
9
10
11
8.5
10
11.5
7.0
7.6
8.2
V
Voltage
Package Pin Description
PACKAGE PIN #
PIN SYMBOL
FUNCTION
s
Total Standby Current
Start-Up Current
0.5
1.0
0.5
1.0
mA
Operating Supply Current
VFB=VSense=0V RT=10kΩ, CT=3.3nF
11
17
11
17
mA
VCC Zener Voltage
ICC=25mA
34
34
V
s
PWM Section
Maximum Duty Cycle
46
48
50
46
48
50
%
Minimum Duty Cycle
0
0
%
8L
14L
16L
PDIP/SO
SO Narrow
SO Wide
1
1
3
COMP
Error amp output, used to compensate error amplifier.
23
4
VFB
Error amp inverting input.
3
5
5
Sense
Noninverting input to Current Sense Comparator.
4
7
6
OSC
Oscillator timing network with Capacitor to Ground, resis-
tor to VREF.
5
9
11
Gnd
Ground.
8
10
Pwr Gnd
Output driver Ground.
610
12
VOUT
Output drive pin.
11
13
VCCPwr
Output driver positive supply.
712
14
VCC
Positive power supply.
814
15
VREF
Output of 5V internal reference.
2,4,6,13
1,2,7,8,9,16
NC
No Connection.
Electrical Characteristics: -25≤TA≤85˚C for CS2844/2845, 0≤TA≤70˚C for CS3844/3845. VCC=15V (Note 1); RT=10kΩ,
CT=3.3nF for sawtooth mode., unless otherwise stated.


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