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Details for MAX8901AETA+T by Maxim Integrated
Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs
DRIVER LED WHITE H/EFFICIENCY SMD
MAX8901AETA+T image

MAX8901AETA+T by Maxim Integrated

DRIVER LED WHITE H/EFFICIENCY SMD
Features
0.01u00b5A (typ) Shutdown Current
2.6V to 5.5V Input Voltage Range
32-Step, Single-Wire Serial Dimming (MAX8901B)
8-Pin, 2mm x 2mm TDFN Package Saves Space
Direct PWM Dimming (MAX8901A)
Fixed-Frequency Operation
Flexible Dimming Control
High Efficiency Extends Battery Life
Input Overvoltage Lockout
Input Undervoltage Lockout
Internal Soft-Start and Thermal Shutdown
No WLED Current in Shutdown
Protection Features Improve System Reliability
Supplies from 2 to 6 WLEDs with 1.3% LED Current Accuracy
Up to 91% Efficiency
WLED Overvoltage Protection (25V typ)
Part Information
MAX8901AETA+T image
RoHS Compliant
Description
The MAX8901A/MAX8901B step-up converters drive from two to six series-connected white LEDs (WLEDs) with constant current to provide uniform WLED intensity for LCD backlighting in cell phones, PDAs, and other handheld devices. The MAX8901_ operate at a fixed 750kHz (typ) switching frequency, allowing for tiny exter- nal components, and are optimized for the highest possi- ble efficiency over the full 1-cell Li+/Li-Poly battery range. These converters use a single input (ON) to enable the IC and to control WLED intensity. The MAX8901A requires a direct PWM input to regulate WLED intensity with the WLED current proportional to the PWM duty cycle. The MAX8901B uses single-wire, serial-pulse dimming that reduces the WLED intensity in 32 linear steps. Full-scale WLED current for serial-pulse dimming is 24.75mA (MAX8901B, 0.75mA/step). The MAX8901_ feature an internal soft-start to eliminate inrush currents during startup, input overvoltage protection, WLED overvoltage protection, and a shut- down mode with 0.01µA (typ) shutdown current. No WLED current is present in shutdown provided the WLED forward voltage is greater than the input supply voltage. Additional features include undervoltage lock- out (UVLO) and thermal shutdown. The MAX8901_ are available in tiny 8-pin, 2mm x 2mm TDFN-EP packages (0.8mm max height).
Specifications
Device Topology:
Boost (Step Up)
No. of Outputs:
1Outputs
Output Current:
24.75mA
Output Voltage:
25V
Driver Case Style:
TDFN
No. of Pins:
8Pins
Input Voltage Min:
2.6V
Input Voltage Max:
5.5V
Switching Frequency:
750kHz
Operating Temperature Min:
-40°C
Operating Temperature Max:
85°C
Product Range:
-
Automotive Qualification Standard:
-
MSL:
MSL 1 - Unlimited
SVHC:
No SVHC (15-Jan-2018)
Base Number:
8901
Device Type:
LED
Dimming Control Type:
PWM
Efficiency:
91%
Input Voltage:
2.6V to 5.5V
LED Driver Application:
Backlighting Cellular Phones
Operating Temperature Range:
-40°C to +85°C
Termination Type:
Surface Mount Device
Topology:
Boost (Step Up)
Alternate Descriptions
Highest Efficiency Supply 8-Pin TDFN EP T/R Avnet America
Highest Efficiency Supply 8-Pin TDFN EP T/R Avnet Europe
Highest Efficiency Supply 8-Pin TDFN EP T/R Avnet Asia
Highest Efficiency Supply for 2 to 6 Series WLEDs in a 2mm x 2mm TDFN Package Future Electronics