CS2842A/3843A SERIES
Electrical Characteristics: continued
CS2842A/CS2843A
MIN TYP MAX
CS3842A/CS3843A
MIN TYP MAX UNITS
PARAMETER
TEST CONDITIONS
s
Output Section: continued
Rise Time
Fall Time
Output Leakage
s
Total Standby Current
Start-Up Current
Operating Supply Current
V
CC
Zener Voltage
V
FB
= V
Sense
= 0V, R
T
= 10kΩ, C
T
= 3.3nF 11
I
CC
= 25mA
CS2842A
MIN
TYP MAX
T
J
= 25˚C, C
L
= 1nF (Note 2)
T
J
= 25˚C, C
L
= 1nF (Note 2)
UVLO Active, V
OUT
= 0
50
50
-0.01
150
150
-10.00
50
50
150
150
ns
ns
-0.01 -10.00 µA
0.5
17
34
1.0
11
0.5
17
34
1.0
mA
mA
V
PARAMETER
TEST CONDITIONS
CS3842A
MIN TYP MAX
CS2843A/CS3843A
MIN TYP MAX UNITS
s
Under-Voltage Lockout Section
Start Threshold
Min. Operating
Voltage
Notes:
15
After Turn On
9
16
10
17
11
14.5
8.5
16.0 17.5
10.0 11.5
7.8
7.0
8.4
7.6
9.0
8.2
V
V
1. Adjust V
CC
above the start threshold before setting at 15V.
2.These parameters, although guaranteed, are not 100% tested in production.
3. Parameter measured at trip point of latch with VFB=0.
4. Gain defined as:
A=
∆V
COMP
∆V
Sense
; 0
≤
VSense
≤
0.8V.
Package Pin Description
PACKAGE PIN #
PIN SYMBOL
FUNCTION
8L PDIP/SO
1
2
3
4
5
14L SO Narrow
1
3
5
7
8
9
COMP
V
FB
Sense
OSC
Gnd
Pwr Gnd
V
OUT
V
CC
Pwr
V
CC
V
REF
NC
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 V
REF
Ground
Output driver Ground
Output drive pin
Output driver positive supply
Positive power supply
Output of 5V internal reference
No Connection
6
10
11
7
8
12
14
2,4,6,13
3
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
