參數(shù)資料
型號(hào)： AS384X
廠商： Electronic Theatre Controls, Inc.
英文描述： Current Mode Controller
中文描述： 電流模式控制器
文件頁(yè)數(shù)： 6/20頁(yè)
文件大小： 155K
代理商： AS384X
6
ASTEC Semiconductor
AS384x
Current Mode Controller
Electrical Characteristics
(contd)
Electrical characteristics are guaranteed over full junction temperature range (0 to 105C). Ambient temperature must be derated
based on power dissipation and package thermal characteristics. The conditions are: V
CC
= 15 V, R
T
= 10 k, and C
T
= 3.3 nF, unless
otherwise stated. To override UVLO, V
CC
should be raised above 17 V prior to test.
Parameter
Symbol
Test Condition
Min.
Typ.
Max.
Unit
PWM
Maximum Duty Cycle
D
max
3842/3
94
97
100
%
Minimum Duty Cycle
D
min
3842/3
0
%
Maximum Duty Cycle
D
max
3844/5
49
49.5
50
%
Minimum Duty Cycle
D
min
3844/5
0
%
Supply Current
Start-up Current
I
CC
3842/4, V
FB
= V
SENSE
= 0 V, V
CC
= 14 V
0.5
1.0
mA
3843/5, V
FB
= V
SENSE
= 0 V, V
CC
= 7 V
0.3
0.5
mA
Operating Supply Current
I
CC
9
17
mA
V
CC
Zener Voltage
V
Z
I
CC
= 25 mA
30
V
Notes:
1. This parameter is not 100% tested in production.
2. Parameter measured at trip point of PWM latch.
3. Transfer gain is the relationship between current sense input and corresponding error amplifier output at the PWM latch trip point
and is mathematically expressed as follows:
4. At the over-temperature threshold, T
OT
, the oscillator is disabled. The 5 V reference and the PWM stages, including the PWM latch,
remain powered.
=
D
A
I
V
V
COMP
SENSE
≤
≤
;
0.2
V
0.8
SENSE
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