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Ultra-High-Efficiency White
LED Drivers
Pin Description
MAX1984
1
2
3
—
PIN
MAX1985
1
2
3
4, 12
MAX1986
1
2
3
—
NAME
OUT
LX
GND
N.C.
FUNCTION
Step-Up Regulator Output. Bypass OUT to GND with a 4.7μF capacitor.
Inductor Connection. LX is connected to the drains of the internal N-channel and
P-channel MOSFETs.
Ground
No Connection. Not internally connected.
LED1 Cathode Connection. LD1 is the open-drain output of an internal current
4
5
4
LD1
regulator for controlling the current through LED1. It is able to sink up to 25mA.
If not used, connect LD1 to GND.
LED2 Cathode Connection. LD2 is the open-drain output of an internal current
5
6
5
LD2
regulator for controlling the current through LED2. It is able to sink up to 25mA.
If not used, connect LD2 to GND.
LED3 Cathode Connection. LD3 is the open-drain output of an internal current
6
7
7
LD3
regulator for controlling the current through LED3. It is able to sink up to 25mA.
If not used, connect LD5 to GND.
LED4 Cathode Connection. LD4 is the open-drain output of an internal current
7
9
8
LD4
regulator for controlling the current through LED4. It is able to sink up to 25mA.
If not used, connect LD4 to GND.
8
8
6
LDG
Common Ground Connection for Internal Current Regulators. Connect LDG to
GND.
LED5 Cathode Connection. LD5 is the open-drain output of an internal current
9
10
—
LD5
regulator for controlling the current through LED5. It is able to sink up to 25mA.
If not used, connect LD5 to GND.
LED6 Cathode Connection. LD6 is the open-drain output of an internal current
10
11
—
LD6
regulator for controlling the current through LED6. It is able to sink up to 25mA.
If not used, connect LD6 to GND.
LED7 Cathode Connection. LD7 is the open-drain output of an internal current
11
—
—
LD7
regulator for controlling the current through LED7. It is able to sink up to 25mA.
If not used, connect LD7 to GND.
LED8 Cathode Connection. LD8 is the open-drain output of an internal current
12
—
—
LD8
regulator for controlling the current through LED8. It is able to sink up to 25mA.
If not used, connect LD8 to GND.
Maximum LED Current Set Input. SETI sets the maximum current through each
LED. Connect SETI to IN for a default maximum current of 18mA; connect SETI to
13
13
9
SETI
GND for the 0.5mA LED test mode. Connect a resistor from SETI to GND to adjust
the maximum current between 12mA to 25mA (see the Setting the Maximum LED
Current section).
14
14
10
REF
1.25V Reference Output. Bypass REF to GND with a minimum 0.22μF ceramic
capacitor.
Brightness Control Input (Multimode):
DPWM Mode: Leave unconnected for greater than 50kHz operation. Add a
15
15
11
BITB
capacitor from BITB to ground for lower frequency operation.
Analog Mode: Analog control signal input.
2- or 3-Bit Parallel Mode: Digital input. Least significant bit (LSB) for 2-bit mode.
8
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相关代理商/技术参数
MAX1986ETE-T 功能描述:LED照明驱动器 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
MAX1987ETM 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE CONTROLLER FOR IMVP-IV CPU - Rail/Tube
MAX1987ETM+ 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE CONTROLLER FOR IMVP-IV CPU - Rail/Tube
MAX1987ETM+T 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE CONTROLLER FOR IMVP-IV CPU - Tape and Reel 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE QUICK-PWM CTRL TQFN48 PQM
MAX1987ETM-T 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE CONTROLLER FOR IMVP-IV CPU - Tape and Reel
MAX1987EVKIT 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE CONTROLLER FOR IMVP-IV C - Rail/Tube
MAX1988ETM 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE CONTROLLER FOR IMVP-IV CPU - Rail/Tube
MAX1988ETM+ 制造商:Maxim Integrated Products 功能描述:DUAL-PHASE CONTROLLER FOR IMVP-IV CPU - Rail/Tube