AMC3843BM 데이터 시트보기 (PDF) - ADDtek Corp
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AMC3843BM Datasheet PDF : 11 Pages
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AMC3842B/43B/44B/45B
ELECTRICAL CHARACTERISTICS (Continued)
Error Amplifier Section
Input Bias Current
Input Voltage
Open Loop Voltage Gain
Unity Gain Bandwidth (note 8)
Power Supply Rejection Ratio
Output Sink Current
Output Source Current
High Output Voltage
Low Output Voltage
Output Section
IBIAS
-0.1 -2 µA
VI(EA) COMP = 2.5V
2.42 2.50 2.58 V
GVO 2V ≤ VO ≤ 4V
65 90
dB
UGBW TJ = 25 OC
0.7 1
MHz
PSRR 12V ≤ VCC ≤ 25V
60 70
dB
ISINK VFB = 2.7V, COMP = 1.1V
2
7
mA
ISOURCE VFB = 2.3V, COMP = 5.0V
-0.5 -1.0
mA
VOH VFB = 2.3V, RL = 15KΩ to GND 5
6
V
VOL VFB = 2.7V, RL = 15KΩ to VREF
0.7 1.1 V
Output Low Level
Output High Level
Rise Time (note 9)
Fall Time (note 9)
Under-Voltage Lockout Section
VOL
ISINK = 20mA
ISINK = 200mA
VOH
ISOURCE = 20mA
ISOURCE = 200mA
tr
TJ = 25 OC, CL = 1nF
tf
TJ = 25 OC, CL = 1nF
0.1 0.4
V
1.4 2.2
13 13.5
V
12 13.0
50 150 ns
50 150 ns
Start Threshold
AMC3842B/44B
VTH(ST) AMC3843B/45B
14.5 16.0 17.5
V
7.8 8.4 9.0
Min. Operating Voltage
AMC3842B/44B
AMC3843B/45B
8.5 10 11.5
V
7.0 7.6 8.2
PWM Section
Maximum Duty Cycle
AMC3842B/43B
Dmax
AMC3844B/45B
94 97 100
%
47 48 50
Total Standby Current
Startup Current
AMC3842B/44B
AMC3843B/45B
0.2
mA
0.2
Operating Supply Current
Zener Voltage
ICC
VFB = ISENSE = 0V
VZ ICC = 25mA
14 17 mA
30 35
V
Note 7:
Note 8:
Note 9:
Note 10:
Adjust VCC above the start threshold before setting at 15V
These parameters, although guaranteed, are not 100% tested in production prior to shipment
Parameters are measured at trip point of latch with VFB = 2V
Gain is measured between ISENSE and COMP with the input changing from 0V to 0.8V
Copyright © 2006 ADDtek Corp.
5
DD019_F -- OCTOBER 2006
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