CM9156A_技术文档

PRELIMINARY

CM9156A

Charge Pump White LED Driver

Product Description

Features

•

3.0V to 6.5V input voltage range

Dual mode operation: 1x and 1.5x

The CM9156A is an efficient, 1.5x switched capacitor

(charge pump) regulator ideal for white LED applica-

tions. It has a regulated 4.5V, 1ꢀ0mA output, capable

of driving up to six parallel white LEDs. With a typical

operating input voltage range from 3.0V to 6.0V, the

CM9156A can be operated from a single-cell Li-Ion

battery.

Fixed 4.5V output with initial accuracy of ꢀ2

Supports up to 180mA (@4V) output

High efficiency at both high and low input voltages

Low external parts count, requires no inductor

PWM brightness control via the ENA pin

Selectable 8kHz, 3ꢀkHz, ꢀ6ꢀkHz, and 650kHz

switching frequency

It features an efficient, 1.5x charge pump circuit that

uses only two 1.0µF ceramic bucket capacitors and two

small capacitors for VIN and VOUT. The CM9156A

offers a selectable switching frequency of 8kHz, 3ꢀkHz,

ꢀ6ꢀkHz, or 650kHz. The LED brightness can be

adjusted by applying a PWM signal on the ENA pin.

•

Low shutdown current of <1µA

Soft start prevents excessive inrush current

Over-temperature and over-current protection

Low output ripple (<12), low EMI

Input protection provides superior ESD rating

requiring only standard handling precautions

TDFN-10 or MSOP-10 package

The CM9156A output voltage is regulated to 4.5V,

52 over the line and load ranges. Up 180mA of output

current is available. The proprietary design architecture

•

Optional RoHS compliant lead free packaging

maintains high efficiency (> 802), and at low V pro-

IN

vides longer battery life. With a high V or when the

IN,

Applications

adapter is powered, it provides cool reliable operation.

It offers low output voltage ripple, typically less than

50mV. Internal over-temperature and over-current

management provide short circuit protection.

•

Drives white LEDs to backlight color LCDs

Drives white or RGB LEDs for camera flash

Cellular phones

MP3 players

PDAs, GPS

The CM9156A is packaged in either a space saving

10-Lead TDFN or 10-Lead MSOP package. It can

operate over the industrial temperature range of -ꢀ5°C

to 85°C.

Typical Application

4.5V

1.0uF

VOUT

C2P

C1P

C1N

PhotonIC^TM

30

1.0uF

3.0V to 6.0V

1.0uF

VIN

GND

C2N

ENA

CM9156A

CLK1

CLK2

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1

PRELIMINARY

CM9156A

Package Pinout

PACKAGE / PINOUT DIAGRAM

TOP VIEW

BOTTOM VIEW

(Pins Down View)

(Pins Up View)

TOP VIEW

10 9

8

7

6

1

ꢀ

3

4 5

VOUT

C1P

1

ꢀ

3

4

5

10

9

CꢀP

C1N

GND

CꢀN

ENA

CMxxx

xxxxxx

GND

PAD

VIN

8

Pin 1

Marking

CLK1

CLKꢀ

7

6

10 9

8

7 6

1

ꢀ 3 4 5

CM9156A-01DE

10 Lead TDFN Package

CM9156A-01MR

10 Lead MSOP Package

Note: This drawing is not to scale.

Ordering Information

PART NUMBERING INFORMATION

Lead-free Finish

Ordering Part Number¹

Pins

10

Package

TDFN

Part Marking

CM9156A-01DE

CM9156A-01MR

10

MSOP

Note 1: Parts are shipped in Tape & Reel form unless otherwise specified.

Specifications

ABSOLUTE MAXIMUM RATINGS

PARAMETER

RATING

UNITS

kV

ESD Protection (HBM)

VIN to GND

ꢀ

[GND - 0.3] to +6.5

V

Pin Voltages

V_OUTto GND

[GND - 0.3] to +6.0

[GND - 0.3] to +4.5

[GND - 0.3] to +6.0

V

C1P, C1N to GND

CꢀP, CꢀN to GND

ENA, CLK1, CLKꢀ to GND

Storage Temperature Range

Operating Temperature Range

Lead Temperature (Soldering, 10s)

-65 to +150

-40 to +85

300

°C

2

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PRELIMINARY

CM9156A

Specifications (cont’d)

ELECTRICAL OPERATING CHARACTERISTICS

VIN = 3.6V. Typical values are at TA = ꢀ5 ºC

UNIT

S

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

V_IN

I_SD

3.0

6.0

V

VIN Supply Voltage

1

µA

Shut-Down Supply Current

ENA = 0

Fs = 8 kHz

ꢀ50

ꢀ80

800

1600

380

470

Fs = 3ꢀ kHz

Fs = ꢀ6ꢀ kHz

Fs = 650 kHz

I_Q

Quiescent Current

1ꢀ00

ꢀ500

Charge Pump Circuit

Fs = ꢀ6ꢀ kHz or 650 kHz,

Iout = 0 mA to 1ꢀ0 mA,

Vin = 3.ꢀV to 6.5V

V_{R LOAD}

Load Regulation

Line Regulation

4.ꢀ

4.0

4.5

4.1

4.7

4.ꢀ

V

Iout = 0 mA to 90 mA,

Vin = 3.0V to 3.ꢀV

Fs = ꢀ6ꢀ kHz or 650 kHz,

Iout = 60 mA,

V_{R LIN}

Vin = 3.ꢀV to 6.5V

4.4

4.0

4.5

4.1

4.6

V

Vin = 3.0V to 3.ꢀV

Vout = 4.5V

4.3

1ꢀ0

V

mA

I_OUT

Output Current

Vout = 4.0V

180

mA

mV

kHz

V_OUTR

Output Ripple Voltage

Fs = ꢀ6ꢀ kHz, Iout = 60 mA

CLK1 = 0, CLKꢀ = 0

50

3ꢀ.8

CLK1 = 1, CLKꢀ = 0

CLK1 = 0, CLKꢀ = 1

CLK1 = 1, CLKꢀ = 1

8.ꢀ

ꢀ6ꢀ

650

kHz

fs

Switching Frequency

CLK1, CLK2

High Level Input Voltage

Low Level Input Voltage

1.ꢀ

1.3

V

0.6

ENA

V_IH

High Level Input Voltage

Low Level Input Voltage

V

V_IL

0.4

Protection

I_LIM

Over-current Limit

400

135

15

600

mA

ºC

T_JSD

T_HYS

Over-temperature Limit

Over-temperature Hysteresis

ºC

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PRELIMINARY

CM9156A

Typical Performance Curves

C =C

=C =C =1.0μF, T =25ºC, unless specified otherwise

IN

OUT

1 ꢀ A

Efficiency

Iout=60mA

Efficiency

Iout=120mA

100

90

80

70

60

50

90

80

70

60

50

3.0

3.5

4.0

4.5

5.0

5.5

6.0

3.0

3.5

4.0

4.5

5.0

5.5

6.0

Input Voltage (V)

262 kHz Load Regulation

5 Vin

650 kHz Load Regulation

4.75

4.50

4.25

4.00

4.75

5 Vin

4.50

4.25

4.00

3.6 Vin

3.4 Vin

3.6 Vin

3.4 Vin

10

30

50

70

90

110

10

30

50

70

90

110

Load Current (mA)

Line Regulation

Iout=60mA

Line Regulation

Iout=120mA

4.6

4.5

4.4

4.3

4.2

4.1

4.0

4.6

4.5

4.4

4.3

4.2

4.1

4.0

3.00

4.00

5.00

6.00

3.00

4.00

5.00

6.00

Vin (V)

4

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PRELIMINARY

CM9156A

Typical Performance Curves (cont’d)

C =C

=C =C =1.0μF, T =25ºC, unless specified otherwise

IN

OUT

1

ꢀ

A

No Load Input Current

Vout vs. Temperature

Vin = 3.6V

4.550

4.525

4.500

4.475

4.450

2000

1600

1200

800

650kHz

262kHz

32kHz

8.2kHz

400

3.2

3.6 4.0

4.4 4.8

Vin (V)

5.2 5.6

6.0

-40

-15

10

35

60

85

Temperature (ºC)

Switching Frequency - 8kHz

Switching Frequency - 32kHz

8.5

8.3

8.0

7.8

7.5

34

33

32

31

85ºC

20ºC

- 40ºC

3.4

- 40ºC

30

3.2

3.4 3.6

3.8 4.0

4.2 4.4

4.6

3.2

3.6

3.8

4.0

4.2

4.4

4.6

Input Voltage (V)

Switching Frequency - 262kHz

Switching Frequency - 650kHz

278

270

262

254

246

690

670

650

630

610

85ºC

20ºC

- 40ºC

-40ºC

3.2 3.4 3.6 3.8

4.0 4.2 4.4 4.6

3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6

Input Voltage (V)

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PRELIMINARY

CM9156A

Typical Performance Curves (cont’d)

C =C

=C =C =1.0μF, T =25ºC, unless specified otherwise

IN

OUT

1 ꢀ A

Vin = 3.8V

Iout=120 mA

Iout=60 mA

100 mV/div

Output Ripple, 262 kHz

Output Ripple, 650 kHz

Vin, 2V/div

Vout, 2V/div

Iin, 200 mA/div

Vin=3.8V

1 ms/div

Startup

Frequency Selection Table

Switching Frequency

CLK1

CLK2

8kHz

32kHz

262kHz

650kHz

1

0

1

0

1

Table 1: Frequency Selection

6

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PRELIMINARY

CM9156A

Functional Block Diagram

3.0V TO 6.0V

1.0uF

VIN

C1P

C1N C2P

C2N

LDOP

re-

ENA

VOUT

4.5V

1.5x Charge Pump

R egulator

1.0uF

GND

OSC

Counter

Driver

CM9156A

CLK1

CLK2

Pin Discriptions

PIN DESCRIPTIONS

LEAD(s)

NAME

DESCRIPTION

1

VOUT

The regulated 4.5V output voltage pin. This pin requires a 1.0μF or larger ceramic

capacitor to ground. This pin connects to the anodes of the LEDs.

ꢀ

3

C1P

VIN

This pin is the plus side of charge pump bucket capacitor C1. Connect a 1.0μF

ceramic capacitor with a voltage rating of 10V or greater between C1N and C1P.

Positive supply voltage input pin. This voltage should be between 3.0V and 6V.

This pin requires a 1.0μF or larger ceramic capacitor to ground.

4

5

6

CLK1

CLKꢀ

ENA

Bit 1 for setting switching frequency (see Table 1)

Bit ꢀ for setting switching frequency (see Table 1)

Enable pin, active high. By applying a PWM signal to this pin, the LED brightness

can be controlled.

7

CꢀN

This pin is the minus side of charge pump bucket capacitor Cꢀ. Connect a 1.0μF

ceramic capacitor between CꢀN and CꢀP.

Ground pin.

8

9

GND

C1N

This pin is the minus side of charge pump bucket capacitor C1. Connect a 1.0μF

ceramic capacitor between C1N and C1P.

10

CꢀP

This pin is the plus side of charge pump bucket capacitor Cꢀ. Connect a 1.0μF

ceramic capacitor between CꢀN and CꢀP.

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PRELIMINARY

CM9156A

Application Information

The CM9156A is a switched capacitor charge pump

voltage converter ideally suited for driving white LEDs

to backlight or sidelight LCD color displays for portable

devices such as cellular phones, PDAs and any appli-

cation where small space and efficiency are critical.

The CM9156A charge pump is the perfect driver for

such portable applications, providing efficiency, com-

pact overall size, low system cost and minimal EMI.

The input voltage, VIN, passes through an LDO pre-

regulator that compares the output voltage to a

precision bandgap reference. After the LDO, the

charge pump boosts the LDO voltage by 1.5 times. A

feedback circuit to the LDO monitors the output

voltage, and when the output voltage reaches 4.5V, the

LDO output will operate at about 3V, regulating the

device output at 1.5 x 3V = 4.5V.

The CM9156A contains a linear low dropout (LDO)

regulator followed by a 1.5x fractional charge pump

that converts the nominal lithium-ion (Li-Ion) or lithium

polymer battery voltage levels (3.6V) by a gain of 1.5

times and regulates the converted voltage to 4.5V,

-52, enough to drive the forward voltage drop of white

LEDs. The CM9156A requires only two external

switched, or bucket, capacitors plus an input and an

output capacitor, providing for a compact, low profile

design. In many applications, all these can conve-

niently be the same value of 1.0μF, commonly available

in a compact 0805 surface mount package.

The charge pump uses two phases from the oscillator

to drive internal switches that are connected to the

bucket capacitors, C1 and Cꢀ, as shown in Figure 1. In

the first switch position, the bucket capacitors are con-

nected in series and each are charged from the LDO to

a voltage of V

/ꢀ. The next phase changes the

LDO

switch positions so that C1 and Cꢀ are put in parallel,

and places them on top of V . The resulting voltage

LDO

across C

is then; V

+1/ꢀV

= 1.5 x V

.

LDO

OUT

LDO

When the input voltage rises above 5V, the charge

pump automatically disables, removing the voltage

gain stage and the output is then provided directly

through the LDO, regulated at 4.5V. This increases the

efficiency and minimizes chip heating in this operating

condition.

The CM9156A is intended for white LED applications,

but it can drive most all types of LEDs with a forward

voltage drop of less than 4V.

The LED current is determined by its series resistor,

R

, and is approximately;

LED

The CM9156A has over-temperature and over-current

protection circuitry to limit device stress and failure dur-

ing short circuit conditions. An overcurrent condition

will limit the output current (approximately 400mA ~

600mA) and will cause the output voltage to drop, until

automatically resetting after removal of the excessive

current. Over-temperature protection disables the IC

when the junction is about 135°C, and automatically

turns on the IC when the junction temperature drops by

approximately 15°C.

4.5V − V_{FWD _LED}

I_LED

=

R_LED

Typical white LEDs have a forward voltage drop,

, of 3.5V to 3.7V. Like single junction devices,

V

FWD_LED

white LEDs often have poorly matched forward volt-

ages. If the LEDs were put in parallel without a series

resistor, the current in the paralleled branches would

vary, resulting in non-uniform brightness. R

in addi-

LED,

tion to setting the current, compensates for this varia-

tion by functioning as a ballast resistor, providing

negative feedback for each paralleled LED.

CM9156A Operation

When a voltage exceeding the undervoltage lockout

threshold (UVLO) is applied to the VIN pin, the

CM9156A initiates a softstart cycle, typically lasting

1000μs. Softstart limits the inrush current while the out-

put capacitors are charged during the power-up of the

device.

8

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PRELIMINARY

CM9156A

Application Information (cont’d)

At nominal loads, the switching losses and quiescent

current are negligible. If these losses are ignored for

^{simplicity, the efficiency,}η, for an ideal 1.5x charge

pump can be expressed as the output power divided by

the input power;

VOUT

C_OUT

VIN

C1

½ V_LDO

FB

LDO

V_LDO

P_OUT

-------------

η ≈

P_IN

For an ideal 1.5x charge pump, I = 1.5 x I

efficiency may be expressed as;

, and the

OUT

IN

C2

½ V_LDO

P_OUT

-------------

P_IN

V_OUT× I_OUT

----------------------------------------

V_IN× 1.5 × I_OUT

V_OUT

⎛

⎝

⎞

⎠

≈

= ----------------------

1.5 × V_IN

Charge C1 and C2 to ½ V

LDO

VOUT

4.5V

V_OUT= 4.5V,

∴ η ≈

C_OUT

1.5×V

VIN

IN

C1

½ V_LDO

The ideal ꢀx charge pump can be similarly expressed;

FB

LDO

V_LDO

P_OUT

------------- ----------------------

4.5V

2.0 × V_IN

≈

P_IN

C2

½ V_LDO

In 1x mode, when the input voltage is above the output

voltage, the part functions as a linear regulator and the

ideal efficiency is simply V

/V .

OUT IN

The typical conversion efficiency plots for these modes,

with some losses, are shown in Figure ꢀ.

Figure 1. Switch operation

Efficiency

Vout=4.5V

100

A conventional charge pump with a fixed gain of ꢀx will

usually develop more voltage than is needed to drive

paralleled white LEDs from Li-Ion sources. This exces-

sive gain develops a higher internal voltage, reducing

system efficiency and increasing battery drain in porta-

ble devices. A fractional charge pump with a gain of

1.5x is better suited for driving white LEDs in these

applications.

1X

85

70

55

40

CM9156A

1.5X

2X

The CM9156A charge pump automatically switches

between two conversion gains, 1x and 1.5x, allowing

high efficiency levels over a wide operating input volt-

age range. The 1x mode allows the regulated LDO

voltage to pass directly through to the output when suf-

ficient input voltage is available. The 1.5x charge pump

is enabled only when the battery input is too low to sus-

tain the output load.

3.0

3.5

4.0

4.5

5.0

5.5

6.0

Input Voltage (V)

Figure 2. Ideal efficiency curve

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PRELIMINARY

CM9156A

Application Information (cont’d)

As can be seen, the CM9156A, with 1x and 1.5x

modes, has better efficiency in this application than a

fixed ꢀx charge pump. At low battery voltages, the

higher efficiency of the charge pump’s 1.5x gain

reduces the battery drain. At higher input voltages,

above 4.9V typically seen when the system is running

off an AC adapter, the CM9156A, operating the 1x

mode, has better efficiency than single mode 1.5x or

ꢀx charge pumps, lowering the power dissipation for

cooler circuit operation and long life.

LED Brightness Control

Changes in ambient light often require the backlight

display intensity to be adjusted, usually to conserve

battery life. There are simple solutions to lowering the

LED brightness when using the CM9156A. A typical

example is shown in Figure 3.

C2P

C1N

VOUT

C1P

VIN

The external bucket capacitors will affect the output

impedance of the converter, so surface-mount, low

ESR ceramic capacitors are recommended. Tantalum

and Aluminum capacitors should not be used because

their ESR is too high. The ceramic dielectric must be

stable over the operating temperature and voltage

range hence X7R or X5R are recommended. In noise

sensitive applications, output ripple can be further

reduced by increasing the capacitance of the output

capacitor. Reflected input ripple current depends on

the impedance of the VIN source, which includes the

PCB traces. Increasing the input capacitor will reduce

this ripple. The input capacitor also affects the output

voltage ripple. All the capacitors should be located

close to the device for best performance.

Vin

GND

CLK1

CLK2

C2N

ENA

CM9156A

PWM input

Figure 3. PWM applied to ENA

VOUT

C1P

VIN

C2P

C1N

Vin

GND

C2N

ENA

Frequency Selection

CLK1

CLK2

The optimal switching frequency depends on the allow-

able system current draw, the load current, ripple and

EMI requirements. The CM9156A’s operating fre-

quency choices are; 8kHz, 3ꢀkHz, ꢀ6ꢀkHz, or 650kHz.

These frequencies are selected by programming the

two digital inputs; CLK1 and CLKꢀ. Refer to Table 1.

The supply current for a charge pump is proportional to

its switching frequency. A lower switching frequency

allows reduced quiescent current for more efficient

operation, but reduces the output current capability,

and in some cases, causes higher ripple. Higher fre-

quencies are used when larger load currents are

demanded.

CM9156A

switch

PWM input

Figure 4. Brightness control,

lower quiescent current

A PWM signal can be used to control the brightness,

which is more efficient than other solutions that dissi-

pate unwanted LED current in the series resistors. It

also maintains LED color fidelity by avoiding color tem-

perature changes that current variations cause to white

LEDs. The LED intensity is determined by the PWM

duty cycle, which can vary from 02 to 1002.

The frequency is typically selected to achieve maxi-

mum efficiency while avoiding sensitive frequencies

with the switching fundamental and its harmonics. The

switching frequency can be set outside the critical fre-

quency spectrums of cellular communications band-

widths. Once set, the switching frequency and its

harmonics remain fixed, making filtering easy.

In the configuration shown in Figure 4, the brightness

is controlled by the PWM signal applied to the LEDs.

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PRELIMINARY

CM9156A

Application Information (cont’d)

Decreased Duty Cycle will lower the LED brightness,

See Figure 5 and Figure 6. The same signal is also

applied to the CM9156A, reducing the charge pump

switching frequency via the CLKꢀ control. When the

PWM signal is high, CLK1 is low, CLKꢀ goes high, the

operating frequency is ꢀ6ꢀkHz (refer to Table 1), and

the LED current path is complete through the switch.

When the PWM signal is low, the LED current is

stopped as the switch turns off, and the switching fre-

quency of the charge pump becomes 3ꢀkHz (CLK1,

CLKꢀ = 0). Operating the charge pump at the lower fre-

quency lowers the quiescent current when the charge

pump is operational (the input voltage below 5V).

C2N, 5V/div

PWM, 20 kHz,

10% D.C., 5V/div

Vout ripple,

200 mV/div

The recommended PWM frequency is between 100Hz

and ꢀ0kHz. If a frequency of less then 100Hz is used,

flicker might be seen in the LEDs. The frequency

should also be greater than the refresh rate of the TFT

display. Higher frequencies will cause a loss of bright-

ness control linearity. In addition, higher frequency can

cause chromaticity shifts because the fixed rise and fall

times of the PWM signal will shift the forward current.

Iin, 200 mA/div

20 uSec/div

Vin=3.8V

Figure 6. Low brightness waveforms

Camera Flash Application

Many smart phones and PDAs include a digital cam-

era. These cameras typically utilize a WLED flash to

illuminate the picture subject in low light conditions.

The CM9156A is easily adapted to such an application.

Figure 7 is a typical application using the CM9156A as

a WLED flash driver, which is ideal for this application

because it is capable of driving up to 1ꢀ0mA from a Li-

ion battery. The One-shot is used to create a single

pulse of a set duration to the ENA pin of the CM9156A.

C2N, 5V/div

PWM, 20 kHz,

60% D.C., 5V/div

Vout ripple,

200 mV/div

The Flash LED modules shown here contain three

matched WLEDs with a common anode and separated

cathodes. The series resistor is chosen based on the

forward drop of the module LEDs (typically 3.3V to

3.8V) and the number of parallel LEDs being driven.

Iin, 200 mA/div

Vin=3.8V 20 uSec/div

Figure 5. High brightness waveforms

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PRELIMINARY

CM9156A

Application Information (cont’d)

C2P

C1N

VOUT

C1P

VIN

Vin

GND

C2N

ENA

R_CATHODE

CLK1

CLK2

CM9156A

One- shot

Pulse

Flash

t

Figure 7. Camera flash application

Layout Guide

The charge pump is rapidly charging and discharging

its external capacitors, so external traces to the capac-

itors should be made as wide and short as allowable to

minimize inductance and high frequency ringing. The

four capacitors should be located as close as practical

to the charge pump, particularly C1 and Cꢀ, which

have the highest dv/dt. Connect ground and power

traces to the capacitors through short, low impedance

paths. Use a solid ground plane, ideally on the back-

side of the PCB, which should carry only ground poten-

tial. Connect the ground side of C , Cout and the chip

IN

GND as close as practical. For best thermal perfor-

mance, the exposed backside lead frame should be

soldered to the PCB.

12 490 N. McCarthy Blvd., Milpitas, CA 95035-5112

l

Tel: 408.263.3214

l

Fax: 408.263.7846

l

www.cmd.com

04/26/06

PRELIMINARY

CM9156A

Application Evaluation Circuit

Note 1: Pull-up and current setting resistor values will vary with application.

Note ꢀ: JP1 jumper selects either Flash WLED application or WLED for LCD backlight application.

Note 3: JPꢀ jumper selects Flash signal or disables signal connected to ENA pin If JPꢀ is not jumpered, then ENA is pulled high.

Note 4: Flash WLEDs have three cathodes and one common anode.

Note 5: The SN74LS0ꢀ is configured as a one-shot pulse generator, with time controlled by R1ꢀ, R16, and C5.

Note 6: J3 jumper inserted will create a 1/60 s flash pulse (16 ms). Without J3 jumper inserted the flash pulse will be will 1/30 s (33

ms.

04/26/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112

l

Tel: 408.263.3214

l

Fax: 408.263.7846

l

www.cmd.com

13

PRELIMINARY

CM9156A

Mechanical Details

TDFN-10 Mechanical Specifications

Mechanical Package Diagrams

Dimensions for the CM9156A packaged in a 10-lead

TDFN package are presented below.

D

For complete information on the TDFN-10, see the Cal-

ifornia Micro Devices TDFN Package Information docu-

ment.

10 9 8 7 6

PACKAGE DIMENSIONS

Package

TDFN

=

JEDEC

No.

MO-229 (Var. WEED-3)

Pin 1

Marking

Leads

10

Millimeters

Nom

0.75

Inches

Nom

Dim.

Min

0.70

0.00

0.45

Max

Min

Max

1 ꢀ 3 4 5

TOP VIEW

A

A1

A2

A3

b

0.80 0.028 0.030 0.031

0.05 0.000 0.001 0.002

0.65 0.018 0.022 0.026

0.008

0.02

0.55

0.10

C

0.20

0.18

2.20

1.40

0.25

0.30 0.007 0.010 0.012

0.118

D

3.00

0.08

C

D2

E

2.30

2.40 0.087 0.091 0.094

0.118

A1

A

A3

Aꢀ

SIDE VIEW

3.00

E2

e

1.50

1.60 0.055 0.060 0.063

0.020

0.50

K

1.30

0.20

1.50

1.70 0.051 0.060 0.067

0.40 0.008 0.012 0.016

NA

1

ꢀ

3

4

5

L

0.30

Pin 1 ID

# per

tube

C0.35

# per

tape and

reel

3000 pieces

GND PAD

L

Dꢀ

Controlling dimension: millimeters

10

9

8

7

6

=

This package is compliant with JEDEC standard MO-ꢀꢀ9, variation

K

WEED-3 with exception of the "Dꢀ" and "Eꢀ" dimensions as called

out in the table above.

b

e

8X

M

0.10

C A B

BOTTOM VIEW

Package Dimensions for 10-Lead TDFN

04/26/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112

l

Tel: 408.263.3214

l

Fax: 408.263.7846

l

www.cmd.com

14

PRELIMINARY

CM9156A

Mechanical Details (cont’d)

MSOP-10 Mechanical Specifications:

Mechanical Package Diagrams

The CM9156A is supplied in a 10-pin MSOP. Dimen-

sions are presented below.

TOP VIEW

For complete information on the MSOP-10, see the

California Micro Devices MSOP Package Information

document.

D

8

10

9

7

6

PACKAGE DIMENSIONS

Package

Pins

MSOP

10

E

H

Pin 1

Marking

Millimeters

Inches

Dimensions

Min

Max

0.95

0.15

0.33

0.30

3.10

Min

Max

0.038

0.006

0.013

0.018

0.1ꢀꢀ

A

A1

B

C

D

E

0.75

0.05

0.17

0.15

ꢀ.90

0.030

0.00ꢀ

0.007

0.006

0.114

1

ꢀ

3

4

5

SIDE VIEW

A

SEATING

PLANE

A1

e

0.50 BSC

4.90 BSC

0.40 0.70

0.0197 BSC

0.193 BSC

0.0157 0.0ꢀ76

4000

B

e

H

L

END VIEW

# per tape

and reel

C

Controlling dimension: inches

L

Package Dimensions for MSOP-10

04/26/06 490 N. McCarthy Blvd., Milpitas, CA 95035-5112

l

Tel: 408.263.3214

l

Fax: 408.263.7846

l

www.cmd.com

15


型号：	CM9156A
厂家：	CALIFORNIA MICRO DEVICES CORP
描述：	Charge Pump White LED Driver 电荷泵白光LED驱动器驱动器泵
文件：	总15页 (文件大小：552K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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