MIC2196BM Micrel Inc, MIC2196BM Datasheet

MIC2196BM

Manufacturer Part Number

MIC2196BM

Description

IC PWM BST FLYBCK CM 8SOIC

Manufacturer

Micrel Inc

Datasheet

1.MIC2196YM.pdf (12 pages)

Specifications of MIC2196BM

Pwm Type

Current Mode

Number Of Outputs

Frequency - Max

440kHz

Duty Cycle

85%

Voltage - Supply

2.9 V ~ 14 V

Buck

Boost

Yes

Flyback

Yes

Inverting

Doubler

Divider

Cuk

Isolated

Operating Temperature

-40°C ~ 125°C

Package / Case

8-SOIC (3.9mm Width)

Frequency-max

440kHz

Input Voltage

14V

Frequency

400kHz

Power Dissipation Pd

285mW

Supply Voltage Range

2.9V To 14V

Digital Ic Case Style

SOIC

No. Of Pins

Operating Temperature Range

-40Â°C To +125Â°C

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC2196BM

Quantity:

5 510

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC2196BM

Manufacturer:

SIEMENS

Quantity:

5 510

Company:

Meier Automation Equipment Co., Limited

Part Number:

MIC2196BM

Manufacturer:

MICREL/麦瑞

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC2196BM TR

Manufacturer:

MICREL

Quantity:

1 486

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC2196BMTR

Manufacturer:

MICREL

Quantity:

1 423

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Download datasheet (232Kb)

General Description

Micrel’s MIC2196 is a high efficiency PWM boost control

IC housed in a SO-8 package. The MIC2196 is optimized

for low input voltage applications. With its wide input

voltage range of 2.9V to 14V, the MIC2196 can be used to

efficiently boost voltages in 3.3V, 5V, and 12V systems, as

well as 1- or 2-cell Li Ion battery powered applications. Its

powerful 2Ω output driver allows the MIC2196 to drive

large external MOSFETs.

The MIC2196 is ideal for space-sensitive applications. The

device is housed in the space-saving SO-8 package,

whose low pin-count minimizes external components. Its

400kHz PWM operation allows a small inductor and small

output capacitors to be used. The MIC2196 can implement

all ceramic capacitor solutions.

Efficiencies over 90% are achievable over a wide range of

load conditions with the MIC2196’s PWM boost control

scheme. Its fixed frequency PWM architecture also makes

the

telecommunications applications.

MIC2196 features a low current shutdown mode of 1μA

and programmable undervoltage lockout.

The MIC2196 is available in an 8-pin SOIC package with a

junction temperature range from –40°C to +125°C.

Data sheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

_________________________________________________________________________________________________________

Typical Application

September 2008

1µF

47µF

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (

MIC2196

16V

10nF

Adjustable Output Boost Converter

10k

VIN

EN/

UVLO

VDD

COMP

MIC2196BM

4.7µH

OUTN

GND

ideal

Si4884

(x2)

for

B530

1.15k

10k

noise-sensitive

12V, 3A

V OUT

120µF

20V

(x3)

Features

• 2.9V to 14V input voltage range

• >90% efficiency

• 2Ω output driver

• 400kHz oscillator frequency

• PWM current mode control

• 0.5μA micro power shutdown

• Programmable UVLO

• Front edge blanking

• Cycle-by-cycle current limiting

• Frequency foldback short-circuit protection

• 8-pin SOIC package

Applications

• Step-up conversion in telecom/datacom systems

• SLIC power supplies

• SEPIC power supplies

• Low input voltage flyback and forward converters

• Wireless modems

• Cable modems

• ADSL line cards

• Base stations

• 1-and 2-cell Li Ion battery operated equipment

408

) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

400kHz SO-8 Boost Control IC

100

0 0.5 1 1.5 2 2.5 3 3.5 4

MIC2196

5V to 12V Efficiency

OUTPUT CURRENT (A)

MIC2196

= 5V

M9999-092908

Related parts for MIC2196BM

MIC2196BM Summary of contents

Page 1

... The MIC2196 is available in an 8-pin SOIC package with a junction temperature range from –40°C to +125°C. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. _________________________________________________________________________________________________________ Typical Application V Si4884 IN 4.7µH 5V (x2) 47µF MIC2196BM 16V VIN OUTN EN/ CS UVLO GND VDD 10k 1µF COMP FB ...

Page 2

... Micrel, Inc. Ordering Information Part Number Voltage MIC2196BM Adj. MIC2196YM Adj. Pin Configuration Pin Description Pin Number Pin Name 1 COMP EN/UVLO VDD 6 GND 7 OUTN 8 VIN September 2008 Frequency Temperature Range 400kHz –40°C to +125°C 400kHz –40°C to +125°C COMP ...

Page 3

Micrel, Inc. Absolute Maximum Ratings Supply Voltage (V ) .......................................................15V IN Digital Supply Voltage (V ).............................................7V DD Comp Pin Voltage (V ) .............................. –0.3V to +3V COMP Feedback Pin Voltage (V ) ............................ –0.3V to +3V FB Enable Pin Voltage ...

Page 4

Micrel, Inc. Parameter Gate Drivers Rise/Fall Time Output Driver Impedance Notes: 1. Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its operating ratings. The ...

Page 5

Micrel, Inc. Typical Characteristics Quiescent Current vs. Supply Voltage 5.0 4.5 Switching 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 Standby 0 INPUT VOLTAGE (V) VDD vs. Load 3.02 3.01 3.00 V ...

Page 6

Micrel, Inc. Functional Diagram V IN EN/UVLO 3 fs/4 Osc Corrective COMP September 2008 C DECOUP Bias V On Control Overcurrent Reset PWM Comparator Ramp Gain = 3.7 Error Amplifier V REF ...

Page 7

Micrel, Inc. Functional Description The MIC2196 is a BiCMOS, switched-mode multi- topology controller. It will operate most low-side drive topologies including boost, SEPIC, flyback and forward. The controller has a low impedance driver capable of switching large N-Channel MOSFETs. It ...

Page 8

Micrel, Inc. A block diagram of the MIC2196 PWM current mode control loop is shown in Figure 1. The inductor current is sensed by measuring the voltage across a resistor The current sense amplifier buffers and amplifies SENSE ...

Page 9

Micrel, Inc. × − × WINDING × V η IN where the winding resistance of the inductor WINDING R is the on resistance of the low side ...

Page 10

Micrel, Inc. The enable pin (pin 3) has two threshold levels, allowing the MIC2196 to shut down in a micro-current mode, or turn-off output switching in standby mode. Below 0.9V, the device is forced into a micro power shutdown. If ...

Page 11

Micrel, Inc. fastest transition times and waveforms without oscillations. Low gate charge MOSFETs will switch faster than those with higher gate charge specifications. • For the same size inductor, a lower value will have fewer turns and therefore, lower winding ...

Page 12

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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