Maxim > Solutions > Blood Pressure Monitors > Light-Emitting Diode (LED)/Electroluminescent (EL) Backlight Driver








Light-Emitting Diode (LED)/Electroluminescent (EL) Backlight Driver



Data Sheets
Part Number Description Key Advantages
MAX1574 180mA, 1x/2x, White LED Charge Pump in 3mm x 3mm TDFN

Integrated dimming saves space. 
MAX1984 Ultra-Efficiency White LED Drivers

Open-LED detection increases reliability. 
MAX1916 Low-Dropout, Constant-Current Triple White LED Bias Supply

Tiny, low-cost, high-efficiency solution saves board space and extends battery life. 
MAX1848 White LED Step-Up Converter in SOT23

Uniform brightness provides better viewing experience in low-light conditions. 



Key Specifications:

LED Drivers
Part Number Battery Input Regulation Topology Max. No. of LEDs LED Channels LED Configuration ILED per Channel
(A)
PWM Dimming Freq.
(kHz)
Dimming Ratio Dimming Control VDROPOUT
(mV)
VCURR_SENSE
(mV)
POUT
(W)
VIN
(V)
VIN
(V)
ICC
(mA)
LED String Volt.
(V)
Oper. Freq.
(kHz)
Budgetary
Price
max max max typ min max max max See Notes
MAX1574  1-Cell Li+ Charge Pump 3 3 Parallel 0.06 - 20 Serial Pulse - - 0.75 2.7 5.5 2 5 1000 $1.44 @1k
MAX1984  Inductor Based 8 8 Parallel 0.025 2000 -
Analog
Digital
PWM
- 100 0.8 2.7 0.6 5 1000 $3.56 @1k
MAX1985  Inductor Based 6 6 Parallel 0.025 2000 -
Analog
Digital
PWM
- 100 0.6 2.7 0.6 5 1000 $3.56 @1k
MAX1986  Inductor Based 4 4 Parallel 0.025 2000 -
Analog
Digital
PWM
- 100 0.4 2.7 0.6 5 1000 $3.05 @1k
MAX1916  Linear 3 3 Parallel 0.06 - - Analog 100 100 1 2.5 0.1 5 - $1.06 @1k
MAX1848  Inductor Based 6 1 Series 0.06 - 20 Analog - 75 0.8 2.6 2 12 1200 $1.32 @1k
See All LED Drivers (80)