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125mA 1x/1.5x Charge Pumps for 5 White LEDs
in 3mm x 3mm TDFN
Pin Description (continued)
MAX8630X
5
6
PIN
MAX8630W
5
6
NAME
C2P
C1P
FUNCTION
Transfer Capacitor 2 Positive Connection. Connect a 1μF ceramic capacitor
from C2P to C2N.
Transfer Capacitor 1 Positive Connection. Connect a 1μF ceramic capacitor
from C1P to C1N.
Output. Connect a 1μF ceramic capacitor from OUT to GND. Connect OUT to
7
7
OUT
the anodes of all the LEDs. In shutdown, OUT is pulled down by an internal
5k Ω resistor.
Enable and Dimming Control for Sub LEDs (LED4 and LED5). Drive ENS logic-
low for greater than 4ms to disable the sub LEDs. Drive both ENM and ENS
logic-low for greater than 4ms to shut down the IC. Drive ENS logic-high to
8
—
ENS
begin soft-start and enable maximum (100%) sub LED current. Subsequent
pulses on ENS cause the sub LED current to decrease in 32 linear steps.
Because of the soft-start delay, it is possible to turn on the IC and quickly set a
dim level so the sub LED current never transitions through the maximum
setting. See the ENM/ENS Dimming Control section.
Enable and Dimming Control for Main LEDs (LED1, LED2, and LED3). Drive
ENM logic-low for greater than 4ms to disable the main LEDs. Drive both ENM
and ENS logic-low for greater than 4ms to shut down the IC. Drive ENM logic-
high to begin soft-start and enable maximum (100%) main LED current.
9
—
ENM
Subsequent pulses on ENM cause the main LED current to decrease in 32
linear steps. Because of the soft-start delay, it is possible to turn on the IC and
quickly set a dim level so the main LED current never transitions through the
maximum setting. See the ENM/ENS Dimming Control section.
Direct PWM input. PWM controls output current as a percentage of full-scale
—
8
PWM
current in proportion to PWM signal duty cycle. The frequency range is 900Hz
to 200kHz.
PWM Filter Capacitor Connection. Connect a capacitor from CPWM to GND to
—
9
CPWM
form a filter with the internal 150k Ω resistor. The recommended capacitor for
10Hz corner is 0.1μF.
10
10
LED5
Sub LED Cathode Connections and Charge-Pump Feedback. Current flowing
into LED_ is based on the ENS (or PWM) description above. The charge pump
11
12
13
14
—
11
12
13
14
—
LED4
LED3
LED2
LED1
EP
regulates the lowest LED_ voltage to 0.12V. Connect LED_ to OUT if the
corresponding LED is not populated.
Main LED Cathode Connections and Charge-Pump Feedback. Current flowing
into LED_ is based on the ENM (or PWM) description above. The charge pump
regulates the lowest LED_ voltage to 0.12V. Connect LED_ to OUT if the
corresponding LED is not populated.
Exposed Paddle. Connect to GND directly under the IC.
6
_______________________________________________________________________________________
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相关代理商/技术参数
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MAX8630YETD15+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
MAX8630YETD15-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 制造商:Maxim Integrated Products 功能描述:125MA 1X/1.5X CHARGE PUMPS FOR 5 WH - Rail/Tube
MAX8630YETD18+ 制造商:Maxim Integrated Products 功能描述:CHG PUMP STPUP/STPDN -0.3V TO 6V 125MA 14TDFN EP - Rail/Tube
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