Datasheet

LED7707 Electrical characteristics
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Symbol Parameter Test condition Min. Typ. Max. Unit
Power switch
K
B
LX current coefficient R
BILIM
= 600 kΩ 1⋅10
6
1.2⋅10
6
1.4⋅10
6
V
R
DS(on)
Internal MOSFET on-resistance
280 500 mΩ
OC and OV protections
V
TH,OVP
Over-voltage protection
reference threshold
1.145 V
Soft-start and power management
EN, Turn-on threshold 1.6
V
EN, Turn-off threshold 0.8
DIM, high level threshold 1.3
DIM, low level threshold 0.8
EN, pull-up current 2.5
μA
SS, charge current 4 5 6
SS, end-of-startup threshold 1.8 2.4 2.6
V
SS, reduced switching
frequency release threshold
0.8
Current generators section
K
R
Current generators gain 1850 V
ΔK
R
(1)
Current generators gain
accuracy
±2.0 %
V
IFB
Feedback regulation voltage 700 750 mV
V
rowx,
FAULT
LED short circuit detection
threshold
MODE tied to SGND 4.0 V
V
FAULT,
LOW
FAULT pin low-level voltage I
FAULT,SINK
= 4 mA 250 380 mV
Thermal shutdown
T
SHDN
Thermal shutdown
turn-off temperature
150
°C
Thermal shutdown hysteresis 30
1. I
ROW
= K
R
/ R
RILIM
, ΔI
ROW
/I
ROW
≈ ΔK
R
/K
R
+ ΔR
RILIM
/R
RILIM
Table 5. Electrical characteristics (continued)