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AS3820 数据表(PDF) 8 Page - Dialog Semiconductor

部件名 AS3820
功能描述  16-Channel White LED Controller for LCD Backlight
PDF  52 Pages
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制造商  DIALOG [Dialog Semiconductor]
网页  http://www.dialog-semiconductor.com/
标志 DIALOG - Dialog Semiconductor

AS3820 数据表(HTML) 8 Page - Dialog Semiconductor

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AS3820
16-Channel White LED Controller for LCD Backlight
Rev. 1.1
Datasheet
© 2019 Dialog Semiconductor
www.dialog-semiconductor.com
8 of 52
05-Feb-2019
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Current Outputs (cont’d)
LED Current Accuracy Over VDAC
I800_ALL
DACref = 800mV,
VDAC = 200mV - 800mV,
TJ = 25°C
(excluding error of external Rset)
-1.5
+1.5
%
LED Current Accuracy Over VDAC and
Temperature
I800_TEMP
DACref = 800mV,
VDAC = 200mV - 800mV,
TJ = -20°C to 115°C
(excluding error of external Rset)
-2
+2
%
Output current pin Gx
IGX
3
4
mA
Output resistor pin Gx
RGX
1.0
1.3
kW
Output voltage pin Gx
Vgx
Igx = 0mA
VDD
V
Feedback Circuit, Fault Detectors
Feedback Current Maximum
IFBMAX
VFB_X > 0.25V
255
m
A
Step Size of FB Counter (LSB)
FB_IDAC_LSB
1
m
A
Overtemperature Limit
TOVTEMP
130
140
150
°C
Overtemperature Hysteresis
THYST
10
°C
Minimum Time to Detect Short
tSHORT_MIN
300
m
s
PWM Generators
Internal Clock for PWM
fOSC
400
500
600
kHz
HSYNC Frequency
fHSYNC
100
2000
kHz
VSYNC Frequency
fVSYNC
60
480
Hz
Digital Pins
High Level Input Voltage
VIH
1.3
V3_2
+ 0.3
V
Low Level Input Voltage
VIL
-0.3
0.8
V
High Level Output Voltage
VOH
I = 2mA
V3_2
- 0.3
V
Low Level Output Voltage
VOL
I = 2mA
0.3
V
Low Level Output Voltage Open Drain
Outputs
VOL_PD
I = 2mA
0.3
V
Input Resistance Pullup Inputs
R_PU
300
kΩ
Input Resistance Pulldown Inputs
R_PD
300
kΩ
VCC = 12V, -40°C ≤ TA ≤ 85°C, unless otherwise specified
Electrical Characteristics (cont.)



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