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White LED Charge Pump with Mono Class D
Audio Amp and Dual LDO
ELECTRICAL CHARACTERISTICS (continued)
(V IN1 = V IN2 = V IN3 = V DD = 3.6V, V AGND = V PGND1 = V PGND2 = 0V, circuit of Figure 2, T A = -40°C to +85°C, unless otherwise noted.
Typical values are at T A = +25°C.) (Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Soft-Start Time
0.1
ms
Regulation Voltage
(V IN1 - V NEG )
5
V
Open-Loop NEG Output
Resistance
Output Current
NEG Discharge Resistance in
Shutdown
(0.5 x V IN1 - V NEG ) / I NEG
V IN1 = 3.2V, LED V FMAX = 3.9V
All LEDs disabled
154
1.75
10
3.5
Ω
mA
k Ω
LED_ CURRENT REGULATORS
Current Setting Range
I LED _
T A = +25°C
0.1
-2
±1
25.6
+2
mA
Current Accuracy
25.6mA setting
T A = -40°C to derating
function start temperature
-5
+5
%
(enabled by I 2 C)
Current-Derating-Function Start
Temperature
0.1mA setting, T A = +25°C
-30
±5
+40
+30
°C
Current-Derating-Function Slope
T A = +40°C to +85°C
-1.67
%/°C
R DS ON
Charge pump inactive
Charge pump active
2.3
5
4.6
14
Ω
Dropout Voltage
25.6mA setting (Note 2)
Charge pump inactive
Charge pump active
72
120
120
360
mV
Current Regulator
Switchover Threshold
Charge pump inactive to active,
V LED_ falling
125
150
175
mV
Current Regulator
Switchover Hysteresis
100
mV
Leakage Current in Shutdown
All LEDs
disabled
T A = +25°C
T A = +85°C
0.01
0.1
1
μA
00
524
Off Blink Time
B7, B6 or B3, B2,
SYNC = 0,
Table 11
01
10
1048
2097
ms
11
00
4194
66
On Blink Time
B5, B4 or B1, B0,
SYNC = 0,
Table 11
01
10
131
262
ms
11
524
LED__RU: B7, B6 or B3, B2
00
262
Ramp-Up/Down Time
LED__RD: B5, B4 or B1, B0
SYNC = 0,
Tables 8, 9, 10 (Note 3)
01
10
11
524
1048
2097
ms
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