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LD7890GS Datasheet(PDF) 7 Page - Leadtrend Technology

Part # LD7890GS
Description  High Voltage 4-Channel LED Controller Driver
PDF  16 Pages
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Manufacturer  LEADTREND [Leadtrend Technology]
Direct Link  https://www.leadtrend.com.tw/
Logo LEADTREND - Leadtrend Technology

LD7890GS Datasheet(HTML) 7 Page - Leadtrend Technology

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LD7890
7
Leadtrend Technology Corporation
www.leadtrend.com.tw
LD7890-DS-01 November, 2013
Electrical Characteristics
(VIN=12V, VEN=5V, GND=0V, TA=25C, unless otherwise noted.)
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNITS
Input Power
Input Voltage range
9
28
V
VIN Operating Current
EN=DIM=5V,
No load with switching
10
mA
VIN Shutdown Current
EN=DIM=0V
40
80
A
VIN Stand-By Current
EN=5V, DIM=0V
3
mA
Under Voltage Lockout
Lockout Threshold
VINLOCKOUT
7.5
V
Resume Threshold
VINRESUME
8.9
V
Drive Logic
DRV gate driver
*
Source current, VIN=12V
1
A
Sink current, VIN=12V
1.3
A
DRV Output Clamp Level
VIN=24V
8.5
10
13
V
Boost Controller
Adjustable Switching frequency
50
700
kHz
RRT =200k
290
325
360
kHz
Boost Maximum duty cycle
FSW=300kHz
90
96
%
Current Sense Threshold
0.45
0.5
0.55
V
Current Sense LEB Time
Leading edge blanking time
270
330
410
ns
VSET Reference Voltage
0.64
0.8
0.96
V
LED Current Source Regulator :
Reference Voltage for SENSEN
Voltage 0.4V.
(ILED=VSENSE/RSENSE)
VIN=12V~24V
VSENSE_REF =0.4V
3%
V
SENSE Voltage CH to CH Matching
rage
Vsense_ave
×
2
Vsense_min
-
Vsense_max
±2%
%
GATE1~GATE4 High Voltage
EN=DIM=5V,
SENSE[1~4]=0.2V,
5.5
7
V
GATE1~GATE4 Low Voltage
EN=DIM=5V,
SENSE[1~4]=0.6V,
-0.3
0.25
V



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