LED7706 Datasheet, PDF (9/31 Pages) STMicroelectronics – 6-rows 30 mA LEDs driver with boost regulator for LCD panels backlight

LED7706
4
Electrical characteristics
Electrical characteristics
Table 6.
Symbol
Electrical characteristics
(V_IN = 12 V; T_A = 0 °C to 85 °C and LDO5 connected to AVCC if not otherwise specified)
Parameter
Test condition
Min Typ Max Unit
Supply section
V_LDO5
V_AVCC
LDO output and IC supply
voltage
I_IN,Q Operating quiescent current
EN High
I_LDO5 = 0 mA
R_RILIM = 51 kΩ, R_BILIM = 220 kΩ,
R_SLOPE = 680 kΩ
DIM tied to SGND.
I_IN,SHDN
V_UVLO,ON
Operating current in shutdown
LDO5 Under Voltage Lock Out
upper threshold
EN low
V_UVLO,OFF
LDO5 Under Voltage Lock Out
lower threshold
LDO linear regulator
Line regulation
LDO dropout voltage
LDO maximum output current
Boost section
6 V ≤ V_IN ≤ 28 V, I_LDO5 = 30 mA
V_IN = 4.3 V, I_LDO5 = 10 mA
V_LDO5 > V_UVLO,ON
V_LDO5 < V_UVLO,OFF
t_ON,min
f_SW
Minimum switching on-time
Default switching frequency FSW connected to AVCC
Minimum FSW sync frequency
FSW sync input threshold
FSW sync input hysteresis
FSW sync min ON time
SYNC output Duty-Cycle
FSW connected to AVCC
(Internal oscillator selected)
SYNC output high level
SYNC output low level
Power switch
K_B
R_DSon
LX current coefficient
Internal MOSFET on-resistance
I_SYNC = 10 µA
I_SYNC = -10 µA
R_BILIM = 600 kΩ
4.4
5
5.5 V
1
mA
20
30 µA
3.8 4.0
V
3.3 3.6
25
mV
80 120
25
40
60
mA
20
30
570 660
210
240 300
20
34
V_AVCC
-20V
200 ns
750 kHz
mV
270 ns
40 %
mV
20
5E5 6E5 7E5 V
280 500 mΩ
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