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MAX849EVKIT

更新时间： 2024-11-19 23:51:59

品牌	Logo	应用领域
美信 - MAXIM		/
页数	文件大小	规格书
4页	50K
描述
Evaluation Kit for the MAX848/MAX849

阅读下载

中文翻译

获取价格

数据手册

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MAX849EVKIT 数据手册

19-1749; Rev 0; 10/96

MAX8 4 9 Eva lu a t io n Kit

Evluates:/MAX849

_______________Ge n e ra l De s c rip t io n

____________________________Fe a t u re s

The MAX849 evaluation kit (EV kit) is an assembled and

tested PC board that implements a complete, one-cell

to three-cell, high-power, low-noise, step-up DC-DC

power converter that’s ideal for portable phones and

other battery-operated equipment. With a 3.3V output

voltage, use one or two cells to get a 250mA to 700mA

output current. With a 5V output voltage, use three cells

or one lithium-ion (Li-Ion) battery to get an 850mA out-

put current.

♦ 250mA to 850mA Output Current!

OUT

(V)

(mA)

1.2

2.4

3.6

3.3

5.0

250

700

500

850

The board includes clips for a standard AA-size bat-

tery, and provides a 10-pin header for user interfacing.

♦ 90% Efficiency

♦ Proven PC Board Layout

To evaluate the MAX848, order a free sample of the

MAX848ESE along with the MAX849 EV kit.

♦ Fully Assembled and Tested

____________________Co m p o n e n t Lis t

♦ 2-Channel Analog-to-Digital Converter (ADC) with

Serial Output for Voltage Monitoring

DESIGNATION QTY

DESCRIPTION

Battery clips

BAT1

Keystone 92

0.22µF ceramic capacitor

0.1µF ceramic capacitors

4.7nF ceramic capacitors

______________Ord e rin g In fo rm a t io n

C2, C3

C4, C5

PART

TEMP. RANGE

BOARD TYPE

MAX849EVKIT-SO

0°C to +70°C

Surface Mount

100µF, 6V, 0.1ESR capacitors

AVX TPSD107M010R0100

CF1, CF2

CF3

Open

22µF, 6V, low-ESR capacitor

AVX TPSD226M025R0200

_____________________________________Qu ic k S t a rt

CI1

This section describes how to operate the MAX849 EV

kit, and how to evaluate its performance. Do not turn

on the power supply until all connections are com-

pleted.

CI2

Open

0.5A, 20V Schottky diode

Motorola MBR0520L

1) Config ure the jump e r a nd re s is tor s e tting s a s

d e s ire d . For a s ta nd a rd 3.3V outp ut a nd 90%

power-OK threshold, close jumper JU1 (Table 1).

10-pin header

2-pin header

3-pin header

JU1

JU2

2) Insert an AA-size battery cell into the battery clips.

Or, connect a 1V to 3V DC power supply to the VIN

and GND input pads. Turn on the power supply.

Quiescent supply current for the board with no load

should be less than 1mA.

10µH, 1.65A, 4.5mm inductor

Sumida CDR74B-100

10Ω, 5% resistor

61.9kΩ, 1% resistor

OBaptetenry clips Keystone 92

1kΩ, 5% resistors

3) The EV kit board turns on automatically, and VOUT

goes to 3.3V.

R4, R11

4) To operate in high-power PWM mode at a particular

frequency between 200kHz and 400kHz, leave JU2

open and drive the CLK/SEL pin with pulses at the

desired frequency. Or, let the MAX849 determine its

own PWM frequency by connecting JU2 1-2. To

operate in low-power PFM mode, connect JU2 2-3.

6.81kΩ, 1% resistor

R6, R7, R9,

R10

1MΩ, 5% resistors

100kΩ, 5% resistor

Maxim MAX849ESE

________________________________________________________________ Maxim Integrated Products

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

12 3 4

中文翻译

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与MAX849EVKIT相关器件

型号	品牌	获取价格	描述	数据表
MAX849LESA	MAXIM	获取价格	Interface IC
MAX850	MAXIM	获取价格	Low-Noise, Regulated, Negative Charge-Pump Power Supplies for GaAsFET Bias
MAX850	ADI	获取价格	低噪声、稳压型、负输出电荷泵，用于GaAsFET偏置电源
MAX8500	MAXIM	获取价格	PWM Buck Converters with Bypass FET for N-CDMA/W-CDMA Handsets
MAX8500ETC	MAXIM	获取价格	PWM Buck Converters with Bypass FET for N-CDMA/W-CDMA Handsets
MAX8500ETC+	MAXIM	获取价格	Switching Regulator, Current-mode, 2.25A, 1000kHz Switching Freq-Max, BICMOS, CQCC12, 4 X
MAX8500ETC-T	MAXIM	获取价格	Switching Regulator, Current-mode, 2.25A, 1000kHz Switching Freq-Max, BICMOS, CQCC12, 4 X
MAX8501	MAXIM	获取价格	PWM Buck Converters with Bypass FET for N-CDMA/W-CDMA Handsets
MAX8501ETC	MAXIM	获取价格	PWM Buck Converters with Bypass FET for N-CDMA/W-CDMA Handsets
MAX8501ETC+	MAXIM	获取价格	Switching Regulator, Current-mode, 2.25A, 1000kHz Switching Freq-Max, BICMOS, CQCC12, 4 X

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