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AD8240YRMZ 参数 Datasheet PDF下载

AD8240YRMZ图片预览
型号: AD8240YRMZ
PDF下载: 下载PDF文件 查看货源
内容描述: [LED Driver/Monitor]
分类和应用: 驱动器监控
文件页数/大小: 12 页 / 258 K
品牌: AD [ ANALOG DEVICES ]
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AD8240
SPECIFICATIONS
T
A
= operating temperature range, V
PLUS
= 13.5 V, unless otherwise noted.
Table 1.
Parameter
V
O
V
O
Regulation
at 25°C
V
O
Regulation
-40°C to 125°C
I
OUT3
V
O
Rise Time
V
SENSE
Gain
V
SENSE
Accuracy
V
SENSE
Output Impedance
Base Drive
PWM Turn-On Threshold
PWM Turn-Off Threshold
V
SENSE
Latch-Off Threshold
Latch-Off Delay
PWM Frequency Range
C
M
C
LOAD
Range
Operating Current
V
PLUS
Operating Range
Shutdown Current
5 V Reference Current
Operating Temperature Range
Conditions
5 V Reference = 5 V
V
PLUS
= 13 V to 27 V
V
PLUS
= 13 V to 27 V
R
SHUNT
= 0.4 Ω
I
OUT
= 250 mA, C
M
= 22 nF, CL = 47 nF
Min
−3
−6
Typ
12
±1
±2
500
12
24
±3
10
Max
+3
+6
Unit
V
%
%
mA
µs
%
kΩ
mA
V
V
V
µs
Hz
nF
%
µA
V
µA
µA
°C
−7
8
15
3.5
0
DC
22
−30
9
PWM low
160
−40
+7
12
0.1
2
1.4
0.3
500
+30
360
27
10
240
+125
CL = 47 nF
V
PLUS
> 13 V
200
1
2
V
O
= 12/5 of the applied reference voltage ±1% typical. Minimum V
PLUS
voltage for regulation depends on the external transistor V
be
and the shunt voltage.
V
O
= 12/5 of the applied reference voltage ±2% typical. Minimum V
PLUS
voltage for regulation depends on the external transistor V
be
and the shunt voltage.
3
The maximum output current level is set by the selection of the current shunt and power transistor.
4
(V
SENSE
– 5 V Reference) The latch-off level is determined by the output level of the sense amplifier. When the amplifier output approaches 5 V, the output is latched off.
This allows the maximum current output level to be determined by the shunt resistor value. Latch-off can be restored to on by cycling the PWM input off and back on.
5
Internal delay only. The external delay depends on the external capacitor values, LED string impedance, and wiring inductance.
6
This specifies V
PLUS
only—ground current includes external transistor base drive.
Rev. 0 | Page 3 of 12