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參數(shù)資料
| 型號： | CS3845GDR8 |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, PDSO8 |
| 封裝： | SO-8 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 158K |
| 代理商： | CS3845GDR8 |
CS2844, CS3844, CS2845, CS3845
http://onsemi.com
5
ELECTRICAL CHARACTERISTICS (continued) (–25
° ≤ TA ≤ 85° for CS2844/2845, 0° ≤ TA ≤ 70° for CS3844/CS3845.
VCC = 15 V*; RT = 10 k, CT = 3.3 nF for sawtooth mode; unless otherwise stated.)
CS2844
CS3844
CS2845/CS3845
Characteristic
Test Conditions
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Unit
Undervoltage Lockout Section
Start Threshold
–
15
16
17
14.5
16
17.5
7.8
8.4
9.0
V
Min. Operating Voltage
After Turn On
9.0
10
11
8.5
10
11.5
7.0
7.6
8.2
V
*Adjust VCC above the start threshold before setting at 15 V.
PACKAGE PIN DESCRIPTION
Package Pin Number
DIP–8 & SO–8
SO–14
Symbol
Description
1
3
COMP
Error amp output, used to compensate error amplifier.
2
3
4
VFB
Error amp inverting input.
3
5
Sense
Noninverting input to Current Sense Comparator.
4
7
6
OSC
Oscillator timing network with capacitor to ground, resistor to VREF.
5
9
11
GND
Ground.
–
8
10
Pwr GND
Output driver ground.
6
10
12
VOUT
Output drive pin.
–
11
13
VCC Pwr
Output driver positive supply.
7
12
14
VCC
Positive power supply.
8
14
15
VREF
Output of 5.0 V internal reference.
–
2, 4, 6, 13
1, 2, 7, 8,
9, 16
NC
No connection.
Figure 2. Test Circuit Open Loop Laboratory Test Fixture
VREF
VCC
VOUT
GND
COMP
VFB
Sense
OSC
0.1
F
0.1
F
RT
1.0 k
1.0 W
2N2222
100 k
VCC
VREF
VOUT
GND
A
5.0 k
Sense
ADJUST
CT
4.7 k
4.7 k
1.0 k
ERROR AMP
ADJUST
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