MIC2292C-15YML TR Micrel Inc, MIC2292C-15YML TR Datasheet

1.6MHz White LED Driver W/ 15V OVP 10% Accuracy

MIC2292C-15YML TR

Manufacturer Part Number

MIC2292C-15YML TR

Description

1.6MHz White LED Driver W/ 15V OVP 10% Accuracy

Manufacturer

Micrel Inc

Type

Backlight, White LEDr

Datasheet

1.MIC2292C-15YML_TR.pdf (10 pages)

Specifications of MIC2292C-15YML TR

Constant Current

Yes

Topology

PWM, Step-Up (Boost)

Number Of Outputs

Internal Driver

Yes

Type - Primary

Backlight

Type - Secondary

White LED

Frequency

1.4MHz ~ 1.8MHz

Voltage - Supply

2.5 V ~ 10 V

Mounting Type

Surface Mount

Package / Case

8-MLF®, QFN

Operating Temperature

-40°C ~ 125°C

Current - Output / Channel

20mA

Internal Switch(s)

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Voltage - Output

Efficiency

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

576-3079-2

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General Description

The MIC2292C and MIC2293C are high frequency, Pulse

Width Modulator (PWM) boost regulators optimized for

constant-current, white LED driver applications. Because

of their constant PWM switching frequencies of 1.6MHz

and 2MHz, respectively, the MIC2292/93C can use the

smallest external components, allowing designers to avoid

sensitive IF bands in their RF applications.

The products feature an internal Schottky diode and two

levels of output overvoltage protection allowing a small

size and efficient DC/DC solution that requires only four

external components.

The 2.5V to 10V input voltage range of MIC2292/3C allows

direct operation from 1- and 2-cell Li Ion as well as 3- to 4-

cell NiCad/NiMH/Alkaline batteries. The MIC2292/3C pro-

ducts are available in a small size 8-pin 2mm × 2mm MLF

package and have a junction temperature range of

–40°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Typical Application

MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.

September 2009

Li Ion

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

1.6MHz PWM White LED Driver with 15V OVP

1µF

MIC2292C-15YML

VIN

15µH

GND

OUT

95mV

0.22µF

16V

Features

• 2.5V to 10V input voltage

• Output voltage up to 34V

• Internal Schottky diode

• 1.6MHz PWM operation (MIC2292C)

• 2.0MHz PWM operation (MIC2293C)

• Stable with ceramic capacitors

• 15V and 34V output overvoltage protection options

• 500mA switch current rating

• 95mV feedback voltage

• <1% line and load regulation

• <1µA shutdown current

• Over-temperature protection

• UVLO

• 8-pin 2mm × 2mm MLF

• –40°C to +125°C junction temperature range

Applications

• White LED driver for backlighting:

• Constant current power supplies

High Frequency PWM White LED Drivers

– Cell phones

– PDAs

– GPS systems

– Digital cameras

– MP3 players

– IP phones

with Internal Schottky Diode and OVP

Li Ion

2MHz PWM White LED Driver with 15V OVP

MIC2292/93C

1µF

MIC2293C-15YML

VIN

package

10µH

GND

OUT

95mV

M9999-091509-A

0.22µF

16V

Related parts for MIC2292C-15YML TR

MIC2292C-15YML TR Summary of contents

Page 1

... General Description The MIC2292C and MIC2293C are high frequency, Pulse Width Modulator (PWM) boost regulators optimized for constant-current, white LED driver applications. Because of their constant PWM switching frequencies of 1.6MHz and 2MHz, respectively, the MIC2292/93C can use the smallest external components, allowing designers to avoid sensitive IF bands in their RF applications ...

Page 2

... Micrel, Inc. Ordering Information Marking Part Number Code MIC2292C-15YML MIC2293C-34YML Notes 1: Contact Micrel Marketing for other voltage options. Pin Configuration Pin Description Pin Number Pin Name 1 OUT 2 VIN AGND PGND EP GND September 2009 Overoltage Junction Protection Temp. Range 15V –40°C to +125°C 34V – ...

Page 3

... FB 3V ≤ V ≤ 5mA ≤ I ≤ 20mA OUT 10V EN SW TURN ON TURN OFF V = 10V EN MIC2292C MIC2293C I = 150mA 30V R MIC2292/93C-15 MIC2292/93C-34 Hysteresis , and the ambient temperature The maximum allowable power dissipation will result in excessive die (2) )........................................ 2.5V to +10V IN ) ............................................ ........................ –40°C to +125°C J ® ...

Page 4

... Micrel, Inc. Typical Characteristics MIC2292C 3 Series LED Efficiency µ µ (mA) LED MIC2293C 6 Series LED Efficiency µ µ (mA) OUT Quiescent Current vs. Input Current 02468 (V) IN Schottky Forward Voltage Drop 700 600 500 400 300 200 100 0 SCHOTTKY FORWARD VOLTAGE DROP (mV) September 2009 ...

Page 5

Micrel, Inc. Typical Characteristics Current Limit vs. Temperature 900 850 800 750 700 650 V = 2.5V IN 600 - 120 TEMPERATURE (°C) September 2009 Switch Frequency vs. Temperature 2 1.6 1.2 0.8 0.4 0 -40 04 ...

Page 6

Micrel, Inc. Functional Characteristics 6-Series LED Circuit with External Soft-Start September 2009 6-Series LED Circuit without External Soft-Start L = 10µ 1µ 0.22µF OUT 20mA OUT 6 LEDs C ...

Page 7

... PWM generator, 500mA bipolar output transistor, and Schottky rectiﬁer diode. The oscillator generates a 1.6MHz clock for the MIC2292C and a 2.0MHz clock for the MIC2293C. The clocks' two functions are to trigger the PWM generator that turns on ...

Page 8

Micrel, Inc. External Component Selection The MIC2292/93C can be used across a wide rage of applications. The table below shows recommended Series LEDs L 2 22µH 15µH 10µH 6.8µH 4.7µH 3 22µH 15µH 10µH 6.8µH 4.7µH 4 22µH 15µH 10µH ...

Page 9

Micrel, Inc. Dimming Control There are two techniques for dimming control. One is PWM dimming, and the other is continuous dimming. 1. PWM dimming control is implemented by applying a PWM signal on EN pin as shown in Figure 1. ...

Page 10

Micrel, Inc. Package Information MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. ...

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