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Part Number: MAX8595X
Description: The MAX8595X/MAX8596X drive up to nine white LEDs with constant current and high efficiency to provide...
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MAX8595X
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DataSheet
General Description
MAX8595X General Description
The MAX8595X/MAX8596X drive up to nine white LEDs with constant current and high efficiency to provide LCD backlighting in cell phones, PDAs, and other handheld devices. The series connection allows the LED currents to be identical for uniform brightness and minimizes the number of traces to the LEDs. The MAX8595X regulates constant LED current over the entire temperature range. The MAX8596X features an ambient-temperature derating function to avoid overdriving the white LEDs during high ambient temperatures, enabling higher drive current below +42°
A single Dual Mode™ input provides a simple means of brightness adjustment and on/off control. Fast 1MHz current-mode PWM operation allows for small input and output capacitors and a small inductor while minimizing ripple on the input supply/battery. Soft-start eliminates inrush current during startup.
The MAX8595X/MAX8596X are available in a spacesaving, 8-pin, 3mm x 3mm TDFN package.
MAX8595X Maximum Ratings
ABSOLUTE MAXIMUM RATINGS
IN to GND ...............................................................-0.3V to +6V
PGND to GND .......................................................-0.3V to +0.3V
LX, OUT to GND.....................................................-0.3V to +40V
CTRL to GND...................-0.3V to the lower of +6V or (VIN + 2V)
COMP, CS to GND ......................................-0.3V to (VIN + 0.3V)
ILX ................................................................................1.0ARMS
Continuous Power Dissipation (TA = +70°C)
8-Pin TDFN 3mm x 3mm
(derate 24.4mW/°C above +70°C)............................ 1950mW
Operating Temperature Range ........................-40°C to +85°C
Junction Temperature.....................................................+150°C
Storage Temperature Range .........................-65°C to +150°C
Lead Temperature (soldering, 10s) ...............................+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
MAX8595X Features
♦ Up to Nine LEDs at 25mA
♦ Temperature Derating Function to Allow Fewer LEDs for Same Light (MAX8596X)
♦ 86% Efficiency (PLEDs / PIN)
♦ 1.7% Current-Regulation Accuracy
♦ Output Overvoltage Protection
♦ Flexible Dimming Control Analog Direct-PWM Internal Filter
♦ 1MHz PWM Switching Frequency
♦ 0.1µF Output Capacitor
♦ 12mVP-P Low Input Ripple
♦ Soft-Start Eliminates Inrush Current
♦ 2.6V to 5.5V Input Range
♦ 0.3µA Shutdown Current
♦ Pin Compatible with the MAX1561 and MAX1599
♦ TDFN 3mm x 3mm x 0.8mm Package with Exposed Paddle
♦ Temperature Derating Function to Allow Fewer LEDs for Same Light (MAX8596X)
♦ 86% Efficiency (PLEDs / PIN)
♦ 1.7% Current-Regulation Accuracy
♦ Output Overvoltage Protection
♦ Flexible Dimming Control Analog Direct-PWM Internal Filter
♦ 1MHz PWM Switching Frequency
♦ 0.1µF Output Capacitor
♦ 12mVP-P Low Input Ripple
♦ Soft-Start Eliminates Inrush Current
♦ 2.6V to 5.5V Input Range
♦ 0.3µA Shutdown Current
♦ Pin Compatible with the MAX1561 and MAX1599
♦ TDFN 3mm x 3mm x 0.8mm Package with Exposed Paddle
MAX8595X Typical Application
Cell Phones and Smart Phones
PDAs, Palmtops, and Wireless Handhelds
e-Books and Subnotebooks
White LED Display Backlighting
PDAs, Palmtops, and Wireless Handhelds
e-Books and Subnotebooks
White LED Display Backlighting
MAX8595X Connection Diagram
MAX8595X
PDF/DataSheet Download
- Datasheet: MAX8595X
- File Size: 235102 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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