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參數(shù)資料
| 型號： | CS3865CGDWR16 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1 A DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.300 INCH, MS-013, SO-16 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 82K |
| 代理商： | CS3865CGDWR16 |
1
Features
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
CS3865C
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
Block Diagram
December, 2001 - Rev. 3
ON Semiconductor
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885–3600 Fax: (401)885–5786
N. American Technical Support: 800-282-9855
Web Site: www.cherry–semi.com
ARCHIVE
DEVICE
NOT
RECOMMENDED
FOR
NEW
DESIGN
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.
+
-
+
-
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
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