FAN5616MPX

FAN5616MPX Datasheet

FAN5616 Constant-Current LED Driver with Adaptive Charge Pump

Part	Datasheet
FAN5616MPX	FAN5616MPX (pdf)

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FAN5616 Constant-Current LED Driver with Adaptive Charge Pump November 2005 FAN5616 Constant-Current LED Driver with Adaptive Charge Pump • 3-Channel Parallel LED Driver for a Large Range of Forward Voltages • Adaptive VOUT Adjustment to the Highest Diode Forward Voltage • Internally Matched LED Current Sources • Matched LED Currents with Matched or Unmatched LEDs • Built-in Charge Pump with Three Modes of Operation: 1x, 1.5x, and 2x • Up to 90% • Up to 50kHz PWM Dimming Frequency • Low EMI, Low Ripple • Up to 120mA Output Current • Drives up to 3 LEDs at 40mA each • External Resistor to Set Maximum 100% LED Current • Built-in 2-bit DAC to Control LED Current in Digital Mode • 2.5V to 5.5V Input Voltage Range • ICC < 1µA in Shutdown Mode • 1MHz Operating Frequency • Shutdown Isolates Output from Input • Smart Soft-Start Limits In-Rush Current • Short Circuit Protection • Minimal External Components Needed • Available in a 3x3mm 16-lead MLP Package • Cell Phones • PDAs, DSCs, and MP3 Players The FAN5616 generates a regulated output current from a battery with an input voltage between 2.7V to 5.5V. Switch and fractional switching techniques are utilized to achieve high over the entire input voltage range. The adaptive nature of the built-in charge pump eliminates the need for LED preselection matching and ensures operation with high The driver's built-in, proprietary, auto-sense circuitry ensures the same high regardless of the number of LEDs. When the input voltage is high to sustain the LED’s programmed current level, the FAN5616 itself to operate as a linear regulator, and the charge pump is turned off. The FAN5616 supports both digital and PWM LED brightness control methods. The built-in 2-bit DAC offers a selection of four LED current levels, each level is a percentage of the maximum LED current set by the external RSET resistor. The FAN5616 includes built-in shutdown, short circuit and thermal protection circuitry. A built-in smart soft-start circuitry prevents excessive current draw during power on while allowing for an increased PWM frequency for dimming. Minimal external components are required. Only two 0.1µF to 1µF bucket capacitors, a 4.7µF input capacitor and a 1µF output capacitor are needed for proper operation. The FAN5616 is available in a 3x3mm 16-lead MLP package. Ordering Information Product Number FAN5616 Package Type 3x3mm 16-Lead MLP Order Code FAN5616MPX 2005 Fairchild Semiconductor Corporation FAN5616 Constant-Current LED Driver with Adaptive Charge Pump RSET EN1 EN2 GND VIN CIN 16 15 14 13 NC 2 NC 3 GND 10 5 67 8 CAP1 CAP2 VOUT COUT Pin Assignment Figure Typical Application Top View EN2 EN1 GND VIN 16 15 14 13 RSET 1 NC 2 NC 3 P1 GND LED- 4 12 CAP211 CAP110 CAP1+ 9 CAP2+ 5 67 8 LEDLEDPGND VOUT 3x3mm 16-Lead MLP Figure Pin Assignment FAN5616 Constant-Current LED Driver with Adaptive Charge Pump Pin Description Pin No. P1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin Name GND RSET NC LEDLEDLEDPGND VOUT CAP2+ CAP1+ CAP1CAP2VIN GND EN1 EN2 Pin Description Ground. P1 must be soldered to the PCB ground. RSET Pin. Connect this pin to the resistor used to set the maximum LED current. No Connection. No Connection. 1st LED Cathode. Connect this pin to the LED’s cathode. 2nd LED Cathode. Connect this pin to the LED’s cathode. 3rd LED Cathode. Connect this pin to the LED’s cathode. Power Ground. Output Voltage. Connect this pin to all of the LED’s anodes. Bucket Capacitor Connect this pin to the positive terminal of the bucket capacitor. Bucket Capacitor Connect this pin to the positive terminal of the bucket capacitor. Bucket Capacitor Connect this pin to the negative terminal of the bucket capacitor. Bucket Capacitor Connect this pin to the negative terminal of the bucket capacitor. Supply Voltage Input. Ground. Enable Input. Enable Input. FAN5616 Constant-Current LED Driver with Adaptive Charge Pump Absolute Maximum Ratings Note1 Parameter VIN, VOUT, EN1, EN2, GND Voltage On All Other Pins CAP+, CAP- to GND Thermal Resistance Junction to Tab Note 2 Lead Soldering Temperature 10 seconds Junction Temperature Storage Temperature Electrostatic Discharge Protection ESD Level Note 3 HBM CDM Min GND Max 6 VIN + VIN + 8 260 150

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FAN5616 Constant-Current LED Driver with Adaptive Charge Pump

November 2005

FAN5616 Constant-Current LED Driver with Adaptive Charge Pump
• 3-Channel Parallel LED Driver for a Large Range of Forward Voltages
• Adaptive VOUT Adjustment to the Highest Diode Forward Voltage
• Internally Matched LED Current Sources
• Matched LED Currents with Matched or Unmatched

LEDs
• Built-in Charge Pump with Three Modes of Operation:
1x, 1.5x, and 2x
• Up to 90%
• Up to 50kHz PWM Dimming Frequency
• Low EMI, Low Ripple
• Up to 120mA Output Current
• Drives up to 3 LEDs at 40mA each
• External Resistor to Set Maximum 100% LED

Current
• Built-in 2-bit DAC to Control LED Current in Digital

Mode
• 2.5V to 5.5V Input Voltage Range
• ICC < 1µA in Shutdown Mode
• 1MHz Operating Frequency
• Shutdown Isolates Output from Input
• Smart Soft-Start Limits In-Rush Current
• Short Circuit Protection
• Minimal External Components Needed
• Available in a 3x3mm 16-lead MLP Package
• Cell Phones
• PDAs, DSCs, and MP3 Players

The FAN5616 generates a regulated output current from a battery with an input voltage between 2.7V to 5.5V. Switch and fractional switching techniques are utilized to achieve high over the entire input voltage range. The adaptive nature of the built-in charge pump eliminates the need for LED preselection matching and ensures operation with high The driver's built-in, proprietary, auto-sense circuitry ensures the same high regardless of the number of LEDs. When the input voltage is high to sustain the LED’s programmed current level, the FAN5616 itself to operate as a linear regulator, and the charge pump is turned off.

The FAN5616 supports both digital and PWM LED brightness control methods. The built-in 2-bit DAC offers a selection of four LED current levels, each level is a percentage of the maximum LED current set by the external RSET resistor.

The FAN5616 includes built-in shutdown, short circuit and thermal protection circuitry. A built-in smart soft-start circuitry prevents excessive current draw during power on while allowing for an increased PWM frequency for dimming.

Minimal external components are required. Only two 0.1µF to 1µF bucket capacitors, a 4.7µF input capacitor and a 1µF output capacitor are needed for proper operation.

The FAN5616 is available in a 3x3mm 16-lead MLP package.
Ordering Information

Product Number FAN5616

Package Type 3x3mm 16-Lead MLP

Order Code FAN5616MPX
2005 Fairchild Semiconductor Corporation

FAN5616 Constant-Current LED Driver with Adaptive Charge Pump

RSET

EN1 EN2 GND

VIN CIN
16 15 14 13

NC 2 NC 3

GND 10
5 67 8

CAP1

CAP2

VOUT COUT

Pin Assignment

Figure Typical Application Top View

EN2 EN1 GND VIN
16 15 14 13

RSET 1

NC 2 NC 3

P1 GND

LED- 4
12 CAP211 CAP110 CAP1+ 9 CAP2+
5 67 8

LEDLEDPGND VOUT
3x3mm 16-Lead MLP Figure Pin Assignment

FAN5616 Constant-Current LED Driver with Adaptive Charge Pump

Pin Description

Pin No. P1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Pin Name GND RSET NC LEDLEDLEDPGND VOUT CAP2+ CAP1+ CAP1CAP2VIN GND EN1 EN2

Pin Description Ground. P1 must be soldered to the PCB ground. RSET Pin. Connect this pin to the resistor used to set the maximum LED current. No Connection. No Connection. 1st LED Cathode. Connect this pin to the LED’s cathode. 2nd LED Cathode. Connect this pin to the LED’s cathode. 3rd LED Cathode. Connect this pin to the LED’s cathode. Power Ground. Output Voltage. Connect this pin to all of the LED’s anodes. Bucket Capacitor Connect this pin to the positive terminal of the bucket capacitor. Bucket Capacitor Connect this pin to the positive terminal of the bucket capacitor. Bucket Capacitor Connect this pin to the negative terminal of the bucket capacitor. Bucket Capacitor Connect this pin to the negative terminal of the bucket capacitor. Supply Voltage Input. Ground. Enable Input. Enable Input.

FAN5616 Constant-Current LED Driver with Adaptive Charge Pump

Absolute Maximum Ratings Note1

Parameter VIN, VOUT, EN1, EN2, GND Voltage On All Other Pins CAP+, CAP- to GND Thermal Resistance Junction to Tab Note 2 Lead Soldering Temperature 10 seconds Junction Temperature Storage Temperature Electrostatic Discharge Protection ESD Level Note 3

HBM CDM

Min GND

Max 6

VIN + VIN +
8 260 150

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Datasheet ID: FAN5616MPX 513947