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CS3865CGDW16 Fiches technique(PDF) 1 Page - Cherry Semiconductor Corporation

No de pièce CS3865CGDW16
Description  High Performance Dual Channel Current Mode Controller with ENABLE
Download  8 Pages
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Fabricant  CHERRY [Cherry Semiconductor Corporation]
Site Internet  http://www.cherrycorp.com/
Logo CHERRY - Cherry Semiconductor Corporation

CS3865CGDW16 Fiches technique(HTML) 1 Page - Cherry Semiconductor Corporation

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1
Features
+
-
+
-
VREF
SYNC
Oscillator
Error
Amp 1
Error
Amp 2
Latching
PWM 2
Latching
PWM 1
VREF
Undervoltage
Lockout
5.0V Ref
VCC
Undervoltage
Lockout
VCC
VFB
1
COMP1
ENABLE2
VFB
2
COMP2
CT
RT
Gnd
Pwr Gnd
Sense2
VOUT
2
Sense1
VOUT
1
s
Oscillator has Precise
Duty Cycle
Limit and Frequency
Control
s
500kHz Current Mode
Operation
s
Automatic Feed Forward
Compensation
s
Separate Latching PWMs
for Cycle-By-Cycle
Current Limiting
s
Internally Trimmed
Reference with
Undervoltage Lockout
s
Switchable Second
Output
s
Two High Current Totem
Pole Outputs
s
Input Undervoltage
Lockout with Hysteresis
s
Low Start-Up and
Operating Current
Package Options
16L PDIP & SO Wide
High Performance Dual Channel
Current Mode Controller with ENABLE
1
SYNC
2
3
4
5
6
7
8
CT
RT
VFB
1
COMP1
Sense1
VOUT
1
Gnd
16
15
14
13
12
11
10
9
VCC
VREF
ENABLE2
VFB
2
COMP2
Sense2
VOUT
2
Pwr Gnd
CS3865C
Description
The CS3865C is a high perfor-
mance, fixed frequency, dual cur-
rent mode controller. It is used in
Off-Line and DC to DC converter
applications and require a mini-
mum number of external compo-
nents. This integrated circuit fea-
tures a unique oscillator for precise
duty cycle limit and frequency con-
trol, a temperature compensated
reference, two high gain error
amplifiers, two current sensing
comparators, and two high current
totem pole outputs ideally suited
for driving power MOSFETs. One
of the outputs VOUT
2 is switchable
via the ENABLE 2 pin.
Also included are protective fea-
tures consisting of input and refer-
ence undervoltage lockouts each
with hysteresis, cycle-by-cycle cur-
rent limiting, and a latch for single
pulse metering of each output.
The CS3865C has a 14V start volt-
age and is pin compatible with the
MC34065H.
Block Diagram
Rev. 12/16/96
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
A
Company
®


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