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125mA 1x/1.5x Charge Pumps for 5 White LEDs
in 3mm x 3mm TDFN
ELECTRICAL CHARACTERISTICS (continued)
(V IN = 3.6V, V GND = 0V, EN_ (PWM) = IN, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)
PARAMETER
Open-Loop OUT Resistance
CONDITIONS
1x mode, (V IN - V OUT ) / I OUT
1.5x mode, (1.5V IN - V OUT ) / I OUT
MIN
TYP
0.8
3.2
MAX
1.5
7.2
UNITS
Ω
Maximum OUT Current
OUT Short-Circuit Current Limit
Switching Frequency
Direct-PWM Dimming Filter
Corner Frequency (MAX8630W)
EN_ (PWM) High Voltage
EN_ (PWM) Low Voltage
EN_ (PWM) Minimum Input
Slew Rate
V IN ≥ 3.2V, V OUT = 3.9V
V OUT < 1.25V
C CPWM = 0.1μF, (PWM frequency of 900Hz to 200kHz
recommended)
V IN = 2.7V to 5.5V
V IN = 2.7V to 5.5V
V IN = 2.7V to 5.5V (recommended minimum slew rate)
125
1.4
57
1
10
1
0.4
mA
mA
MHz
Hz
V
V
V/μs
EN_ (PWM) Input Current
V EN_ (PWM) = 0V or 5.5V
T A = +25°C
T A = +85°C
0.01
0.1
1
μA
EN_ (PWM) Low Shutdown Delay
(t SHDN )
4
ms
EN_ t LO (See Figure 4)
EN_ t HI (See Figure 4)
0.5
0.5
500.0
μs
μs
Initial EN_ t HI (See Figure 4)
Thermal Shutdown
Thermal-Shutdown Hysteresis
First EN_ (PWM) high pulse
50
+160
20
μs
°C
°C
Note 1: Limits are 100% production tested at T A = +25°C. Limits over the operating temperature range are guaranteed by design.
Note 2: Dropout voltage is defined as the LED_ to GND voltage at which current into LED_ drops 10% from the value at V LED_ = 0.2V.
Typical Operating Characteristics
(V IN = 3.6V, ENM = ENS = IN, T A = +25°C, unless otherwise noted.)
100
EFFICIENCY vs. INPUT VOLTAGE
DRIVING 5 LEDs
160
INPUT CURRENT vs. INPUT VOLTAGE
DRIVING 5 LEDs
160
INPUT CURRENT vs. INPUT VOLTAGE
DRIVING 3 MAIN LEDs
90
80
70
60
140
120
100
I LED = 20mA
I LED = 8.125mA
V IN FALLING
140
120
100
I LED = 20mA
V IN FALLING
I LED = 1.875mA
50
40
30
20
10
I LED = 20mA
I LED = 8.125mA
V IN FALLING
80
60
40
20
I LED = 1.875mA
80
60
40
20
I LED = 8.125mA
I LED = 1.875mA
0
0
0
2.7
3.0
3.3
3.6
3.9
4.2
2.7
3.0
3.3
3.6
3.9
4.2
2.7
3.0
3.3
3.6
3.9
4.2
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
_______________________________________________________________________________________
3
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MAX8630YETD18+T 功能描述:LED照明驱动器 125mA 1x/1.5x Charge Pump for 5 WLEDs RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N
MAX8630YETD18-T 功能描述:LED照明驱动器 125mA 1x/1.5x Charge Pump for 5 WLEDs RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N