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參數(shù)資料
| 型號： | AS2845 |
| 英文描述： | Current Mode Controller |
| 中文描述： | 電流模式控制器 |
| 文件頁數(shù)： | 6/20頁 |
| 文件大?。?/td> | 94K |
| 代理商： | AS2845 |
AS2842/3/4/5
Current Mode Controller
ASTEC Semiconductor
42
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:
I
V
SENSE
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.
Electrical Characteristics
(cont’d)
Electrical characteristics are guaranteed over full junction temperature range (-40 to 105
°
C ). 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
A
V
COMP
=
≤
≤
;
0.2
V
0.8
SENSE
PWM
Maximum Duty Cycle
D
max
2842/3
94
97
100
%
Minimum Duty Cycle
D
min
2842/3
0
%
Maximum Duty Cycle
D
max
2844/5
49
49.5
50
%
Minimum Duty Cycle
D
min
2844/5
0
%
Supply Current
Start-up Current
I
CC
2842/4, V
FB
= V
SENSE
= 0 V, V
CC
= 14 V
2843/5, V
FB
= V
SENSE
= 0 V, V
CC
= 7 V
0.5
0.3
1.0
0.5
mA
mA
Operating Supply Current
I
CC
9
17
mA
V
CC
Zener Voltage
V
Z
I
CC
= 25 mA
30
V
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PDF描述 |
|---|---|
| AS2840AU | Analog IC |
| AS2842 | Current Mode Controller |
| AS2843 | Current Mode Controller |
| AS2844 | Current Mode Controller |
| AS2845D-8 | Current Mode Controller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AS28450FLF | 制造商:TT Electronics / IRC 功能描述:AS28450FLF |
| AS28450HLF | 制造商:TT Electronics / IRC 功能描述:AS28450HLF |
| AS28450JLF | 制造商:TT Electronics / IRC 功能描述:AS28450JLF |
| AS28451FLF | 制造商:TT Electronics / IRC 功能描述:AS28451FLF |
| AS28451HLF | 制造商:TT Electronics / IRC 功能描述:AS28451HLF |
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