Electrical Characteristics: continued
CS2842A/CS2843A
CS3842A/CS3843A
PARAMETER
TEST CONDITIONS
MIN TYP MAX MIN TYP MAX UNITS
ꢀ Output Section: continued
Rise Time
TJ = 25˚C, CL = 1nF (Note 2)
TJ = 25˚C, CL = 1nF (Note 2)
UVLO Active, VOUT = 0
50
50
150
150
50
50
150 ns
150 ns
Fall Time
Output Leakage
-0.01 -10.00
-0.01 -10.00 µA
ꢀ Total Standby Current
Start-Up Current
0.5
17
34
1.0
0.5
17
34
1.0 mA
Operating Supply Current
VCC Zener Voltage
VFB = VSense = 0V, RT = 10kΩ, CT = 3.3nF 11
11
mA
V
ICC = 25mA
CS2842A
CS3842A
CS2843A/CS3843A
PARAMETER
TEST CONDITIONS
MIN
TYP MAX MIN TYP MAX MIN TYP MAX UNITS
ꢀ Under-Voltage Lockout Section
Start Threshold
15
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
Min. Operating After Turn On
Voltage
Notes:
1. Adjust VCC above the start threshold before setting at 15V.
3. Parameter measured at trip point of latch with VFB=0.
4. Gain defined as:
2.These parameters, although guaranteed, are not 100% tested in production.
∆VCOMP
A =
; 0 ≤ VSense ≤ 0.8V.
∆VSense
Package Pin Description
PACKAGE PIN #
8L PDIP/SO 14L SO Narrow
PIN SYMBOL
FUNCTION
1
2
3
4
1
3
5
7
COMP
VFB
Error amp output, used to compensate error amplifier
Error amp inverting input
Sense
OSC
Noninverting input to Current Sense Comparator
Oscillator timing network with Capacitor to Ground, resistor
to VREF
5
6
8
9
Gnd
Pwr Gnd
VOUT
Ground
Output driver Ground
Output drive pin
10
11
VCCPwr
VCC
Output driver positive supply
Positive power supply
Output of 5V internal reference
No Connection
7
8
12
14
VREF
2,4,6,13
NC
3
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
