The LN2113 and LN2114 are low noise, constant frequency charge pump DC/DC converters that use fractional (1.5X) conversion to increase efficiency in white LED applications. The devices can be used to produce current levels up to 20mA for each output from a 2.7V to 5.5V input. A low external parts count (two 1μF flying capacitors and two small bypass capacito.
LN2113: four outputs
LN2114: six outputs
20mA full-scale current
32-position logarithmic scale with digital control
Low noise constant frequency operation
33% less input current than doubler charge pump
High accuracy brightness matching
Vin range: 2.7v to 5.5v
IQ <1μa in shutdown
16-pin QFN, 12-pin TSOPJW package
Simple serial interface
Automatic soft start
Small application circuit
No inductors
Regulated output current
600KHz switching frequency
■ Applications
LCD backlighting
MP3/MP4 player
PDA、Notebook
Digital camera
Programmable current source
■ Pa.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | LN2112 |
natlinear |
PWM Control Step-up DC/DC Converter - Backlight Driver | |
2 | LN2113 |
natlinear |
High Efficiency 1.5X Fractional Charge Pumps | |
3 | LN2115 |
natlinear |
Step-up DC/DC Converter - Backlight Driver | |
4 | LN2117 |
natlinear |
Step-up DC/DC Converter - Backlight Driver | |
5 | LN2118 |
natlinear |
Step-up DC/DC Converter - Backlight Driver | |
6 | LN2119 |
natlinear |
PWM Control Step-up DC/DC Converter | |
7 | LN2102 |
natlinear |
2A / 23V Step-Down LED Driver | |
8 | LN2103 |
natlinear |
2A / 40V Step-Down LED Driver | |
9 | LN210RPX |
Panasonic |
LED | |
10 | LN2120 |
natlinear |
Step-up DC/DC Converter - Backlight Driver | |
11 | LN2122 |
natlinear |
Low-voltage step-up LED driver that supports high-frequency PWM dimming | |
12 | LN2130 |
natlinear |
Low-voltage step-up LED driver that supports high-frequency PWM dimming |