ASM8I1843F-08-MX ALSC [Alliance Semiconductor Corporation], ASM8I1843F-08-MX Datasheet - Page 4

• Manufacturer Part Number: ASM8I1843F-08-MX
• Description: Voltage Mode PWM Controller with EMI Reduction
• Manufacturer: ALSC [Alliance Semiconductor Corporation]

June 2005
rev 0.6
Electrical Characteristics
Unless otherwise noted, V
values are at 25°C.
REFERENCE SECTION
ASM8P18S42 & ASM8P1843
Output voltage
Line Regulation
Total Reference variation
Temperature Stability
Load Regulation (ASM8P1843)
ERROR AMPLIFIER SECTION
Input Bias Current
Input Voltage
Open Loop Voltage Gain
Power Supply Rejection Ratio
Output Sink Current
Output Source Current
High Output Voltage
Low Output Voltage
CURRENT SENSE SECTION
Over Current Protection
Threshold
Delay to output
Under Current Sense Period
Under Current Recovery Period
Cycle Skip
OUTPUT SECTION
Low Output Voltage
High Output Voltage
On Resistance, High
On Resistance, Low
Parameter
DD
=15V, Capacitor on F
Voltage Mode PWM Controller with EMI Reduction
Notice: The information in this document is subject to change without notice.
Cycle Skip
condition:
Symbol
R
R
N V
PSRR
I
TC
V
T
SENS
SEL
0.1V
DS(ON)H
V
A
T
DS(ON)L
I
V
V
V
T
V
I(MAX)
BIAS
I
UCSD
I
V
UCS
REF
VOL
OH
OL
OH
OH
OL
PD
OL
REF
= 330pf, I
REF
I
R
T
12V < V
Line, Temperature
ImA < Io < 20mA
V
V
V
V
V
V
FB = 0V (V
V
I
I
I
I
I
I
SENS
SINK
SINK
SOURCE
SOURCE
SOURCE
SINK
A
pin1
START
FB
FB
FB
FB
FB
= +25°C, I
= 1.32V, V
= 1.18V, V
= 1.25V, R
= 1.25V
= 0V, I
= 0.5V. Specifications are over the –40°C to +85°C ambient temperature range. Typical
= 50mA
= 200mA
= 0.2A
= 1.25V
ASM8P18S42ER
ASM8P18S43ER
ASM8P18S44ER
ASM8P18S45ER
ASM8P18S42,
< V
= 50mA
= 200mA
= 0.2A
Conditions
ASM8P1843
DD
CC
SNS
< 18V, I
COMP
OUT
< V
= 0 to 2V
COMP
COMP
L
= 5V)
= 15KP
= 1mA
CC
OUT
= 0.15V
= 4.17V
max
At V
= 5?A
=15V
DD
ASM8P18S44ER / ASM8P18S45ER
Min
4.90
4.17
0.90
1.2
ASM8P18S42 / ASM8P18S42ER
ASM8P1843 / ASM8P18S43ER
0.128
0.470
14.71
13.77
Typ
5.00
1.25
0.15
1.00
1/10
Skip
-1.5
200
-20
0.5
0.3
1/4
6.5
2.5
No
25
25
65
80
3
Max
1.10
125
5.1
0.7
1.3
Cycles of PWM
Frequency
mV/°C
Units
4 of 11
mV
mV
mA
mA
x f
ms
?A
dB
dB
ns
%
P
P
V
V
V
V
V
V
V
S