CS2845LN8 Ver la hoja de datos (PDF) - ON Semiconductor
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CS2845LN8 Datasheet PDF : 12 Pages
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CS2844, CS3844, CS2845, CS3845
ELECTRICAL CHARACTERISTICS (continued) (–25° ≤ TA ≤ 85° for CS2844/2845, 0° ≤ TA ≤ 70° for CS3844/CS3845.
VCC = 15 V*; RT = 10 kΩ, CT = 3.3 nF for sawtooth mode; unless otherwise stated.)
CS2844
CS3844
CS2845/CS3845
Characteristic
Test Conditions
Undervoltage Lockout Section
Start Threshold
–
Min Typ Max Min Typ Max Min Typ Max Unit
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
1
1
3
2
3
4
3
5
5
4
7
6
5
9
11
–
8
10
6
10
12
–
11
13
7
12
14
8
14
15
–
2, 4, 6, 13 1, 2, 7, 8,
9, 16
Symbol
COMP
VFB
Sense
OSC
GND
Pwr GND
VOUT
VCC Pwr
VCC
VREF
NC
Description
Error amp output, used to compensate error amplifier.
Error amp inverting input.
Noninverting input to Current Sense Comparator.
Oscillator timing network with capacitor to ground, resistor to VREF.
Ground.
Output driver ground.
Output drive pin.
Output driver positive supply.
Positive power supply.
Output of 5.0 V internal reference.
No connection.
4.7 kΩ
1.0 kΩ
ERROR AMP
ADJUST
4.7 kΩ
2N2222
100 kΩ
5.0 kΩ
Sense
ADJUST
RT
COMP
VFB
Sense
OSC
VREF
VCC
0.1 µF
VOUT
GND
A
1.0 kΩ
1.0 W
0.1 µF
VREF
VCC
VOUT
CT
Figure 2. Test Circuit Open Loop Laboratory Test Fixture
GND
http://onsemi.com
5
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