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LD5805GS Datasheet(PDF) 9 Page - Leadtrend Technology

Part # LD5805GS
Description  Step up, 4 strings, Max. 250mA/string, Multi-dimming mode WLED Backlight Controller
PDF  18 Pages
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Manufacturer  LEADTREND [Leadtrend Technology]
Direct Link  https://www.leadtrend.com.tw/
Logo LEADTREND - Leadtrend Technology

LD5805GS Datasheet(HTML) 9 Page - Leadtrend Technology

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LD5805
06/15/2015
9
Leadtrend Technology Corporation
www.leadtrend.com.tw
LD5805-DS-01 June 2015
Electrical Characteristics
(VIN=12V, TA=25C, unless otherwise noted.)
PARAMETER
CONDITIONS
SYMBOL
MIN
TYP
MAX
UNITS
Input Power
Input Voltage range
6
36
V
VIN Operating Current
EN=PWM=5V
IQVIN
6
15
mA
VIN Shutdown Current
EN=PWM=0V
IVI_OFF
10
15
uA
Under Voltage Lockout
Turn ON Level
UVLO(ON)
VIN_ON
6.5
V
Turn OFF Level
UVLO(OFF)
VIN_OFF
4
V
Hysteresis
UVLO_HYS
0.2
0.45
0.7
V
LDO Regulator
LDO output voltage for VCC pin
VIN >12V
VVCC
9
10
11
V
VCC Output Current Capability
VIN >12V
IVCC
15
mA
Drive Logic
DRV Output Clamp Level
VIN >12V
VDRV_H
9
10
11
V
DRV Output Rise Time
CDRV=1nF, VIN ≥ 12V, *
Tr_DRV
25
45
65
ns
DRV Output Fall Time
CDRV=1nF, VIN ≥ 12V, *
Tf_DRV
10
30
50
ns
LED Current Regulation
Absolute tolerance of regulation LED
Current per Channel,
ILEDX (mA)= 1200 / RISET(k)
ISET=12Kohm
ILED
97
100
103
mA
LEDs Current Matching
Calculating (I(MAX)-I(MIN))/2xIAveragex100%
LED current= 100mA
MATCH
±2.7
%
Absolute Tolerance of Regulation LED
Current per Channel at Minimum
Dimming
ISET=12Kohm
ADIM=0V
ILEDA0_CAL
2
6
%
LEDs Current Matching
Calculating at Minimum Dimming
(I(MAX)-I(MIN))/2xIAveragex100%
ISET=12Kohm
ADIM=0V
MATCH0
+/-3
+/-5
%
LED regulation voltage
ILED=100mA/per
channel
VLEDRG
0.45
V
Boost Controller
Switching frequency
100
500
kHz
Operating Frequency
RRT =148 k
FSW200
189
210
231
kHz
Boost Maximum duty cycle
FSW=210kHz
DMAX
85
95
%
Leading edge blanking time
TLEB
200
300
ns



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