MC34063A_12 [UTC]

DC TO DC CONVERTER CONTROLLER; DC -DC转换器控制器


型号：	MC34063A_12
厂家：	Unisonic Technologies
描述：	DC TO DC CONVERTER CONTROLLER DC -DC转换器控制器转换器控制器
文件：	总9页 (文件大小：439K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UNISONIC TECHNOLOGIES CO., LTD

MC34063A

LINEAR INTEGRATED CIRCUIT

DC TO DC CONVERTER

CONTROLLER

DESCRIPTION

The UTC MC34063A is a monolithic regulator subsystem,

intended for use as DC to DC converter. This device contains a

temperature compensated band gap reference, a duty-cycle

control oscillator, driver and high current output switch. It can be

used for step down, step-up or inverting switching regulators as

well as for series pass regulators.

FEATURES

* Operation from 3.0V to 40V.

* Short circuit current limiting.

* Low standby current.

* Output switch current of 1.5A without external transistors.

* Frequency of operation from 100Hz to 100kHz.

* Step-up, step-down or inverting switch regulators.

ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

MC34063AL-D08-T

MC34063AL-S08-R

MC34063AL-S08-T

MC34063AG-D08-T

MC34063AG-S08-R

MC34063AG-S08-T

DIP-8

SOP-8

Tube

Tape Reel

Tube

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MC34063A

LINEAR INTEGRATED CIRCUIT

PIN CONFIGURATION

Switch Collector

Switch Emitter

Timing Capacitor

GND

Driver Collector

I^PEAKSense

V_CC

Comparator Inverting input

PIN DESCRIPTION

PIN NO

PIN NAME

Switch Collector

Switch Emitter

Timing Capacitor

GND

I/O

DESCRIPTION

Internal Darlington pairs TI collector

Internal Darlington pairs TI emitter

The value of selected capacitor controls the internal oscillator run rate

Comparator Inverting

Input

Inverting input of comparator which can set & initiate the Darlington pairs

output switch

V_CC

Current sense input to monitor the voltage drop across an external

resistor placed in series with V_CC

I_PEAKSense

Driver Collector

Internal Darlington pairs TI collector

BLOCK DIAGRAM

Switch Collector

Switch Emitter

Timing Capacitor

GND

Drive Collector

IPEAK Sense

Vcc

OSCILLATOR

COMP.

Comparator Inverting

Input

1.25VREF

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MC34063A

LINEAR INTEGRATED CIRCUIT

ABSOLUTE MAXIMUM RATINGS (T_A=25℃, unless otherwise specified. )

PARAMETER

SYMBOL

V_CC

RATINGS

UNIT

Supply Voltage

Comparator Input Voltage

Switch Collector Voltage

Switch Emitter Voltage

Switch Collector to Emitter Voltage

Driver Collector Voltage

Switch Current

V_IN(COMP)

V_C(SW)

V_E(SW)

V_CE(SW)

V_C(DR)

I_SW

-0.3 ~ +40

1.5

DIP-8

1250

625

Power Dissipation (T_A=25°C)

P_D

SOP-8

Junction Temperature

Operating Temperature

Storage Temperature

T_J

+150

0 ~ +70

-65 ~ +150

℃

T_OPR

T_STG

Note: Absolute maximum ratings are those values beyond which the device which the device could be permanently

damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.

THERMAL DATA

PARAMETER

SYMBOL

RATINGS

100

UNIT

DIP-8

Junction-to-Ambient

θ_JA

℃/W

SOP-8

160

ELECTRICAL CHARACTERISTICS (V_CC=5.0V, T_A=0~+70℃, unless otherwise specified.)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN TYP MAX UNIT

OSCILLATOR

Charging Current

I_CHG

I_DISCHG

V_OSC

V_CC=5 to 40V, T_A=25℃

μA

Discharging Current

V_CC=5 to 40V, T_A=25℃

T_A=25℃

140 190 260 μA

Oscillator Amplitude

0.5

6.1

Discharge to Charge Current Ratio

Current limit Sense Voltage

OUTPUT SWITCH

V₇=V_CC, T_A=25℃

I_CHG=I_DISCHG, T_A=25℃

5.2

7.5

V_SENSE

250 300 350 mV

Saturation Voltage 1 (Note)

Saturation Voltage 2 (Note)

DC Current Gain (Note)

Collector Off State Current (Note)

COMPARATOR

V_CE(SAT)1I_SW=1.0A, V_C(DRIVER)=V_C(SW)

V_CE(SAT)2I_SW=1.0A, V_C(DRIVER)=50mA

0.95 1.3

0.45 0.7

180

G_{I (DC)}

I_C(OFF)

I_SW=1.0A, V_CE=5.0V, T_A=25℃

V_CE=40.0V, T_A=25℃

0.01 100 μA

Threshold Voltage

V_THD

I_I(BIAS)

1.21 1.24 1.29

Threshold Voltage Line Regulation

Input Bias Current

V_CC=3 ~ 40V

V_IN=0V

2.0

5.0 mV

400 nA

TOTAL DEVICE

_CC=5~40V, C_T=0.001

Supply Current

I_CC

2.7

4.0 mA

V₇=V_CC, V_C>V_THD, Pin2=GND

Note: Output switch tests are performed under pulsed conditions to minimize power dissipation.

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MC34063A

LINEAR INTEGRATED CIRCUIT

STEP-UP CONVERTER

170μH

180

S Q

1N5819

I_PK

C_T

R_SC0.22

V^IN12V

O_SC

C_T

V_CC

100

1.25V

R^EFREG

Comp.

1500pF

1.0μH

R₂

47k

V^OUT

28V/175mA

V^OUT

R₁2.2k

100

330

C_O

Optional Filter

TEST

CONDITIONS

V_IN= 8.0V ~ 16V, I_OUT= 175mA

RESULTS

30mV = ±0.05%

Line Regulation

Load Regulation

Output Ripple

Efficiency

V_IN= 12V, I_OUT= 75mA ~ 175mA

V_IN= 12V, I_OUT= 175mA

10mV = ±0.017%

400mV_P-P

87.7%

Output Ripple With Optional Filter

40mV_P-P

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MC34063A

LINEAR INTEGRATED CIRCUIT

STEP-DOWN CONVERTER(Cont.)

TEST

CONDITIONS

V_IN= 15V ~ 25V, I_OUT= 500mA

V_IN= 25V, I_OUT= 50mA ~ 500mA

V_IN= 25V, I_OUT= 500mA

V_IN= 25V, R_L= 0.1Ω

RESULTS

12mV = ±0.12%

3.0mV = ±0.03%

120mV_P-P

Line Regulation

Load Regulation

Output Ripple

Short Circuit Current

Efficiency

1.1A

V_IN= 25V, I_OUT= 500mA

83.7%

Output Ripple With Optional Filter

40mV_P-P

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MC34063A

LINEAR INTEGRATED CIRCUIT

VOLTAGE INVERTING CONVERTER

TEST

CONDITIONS

V_IN= 4.5V ~ 6.0V, I_OUT= 100mA

V_IN= 5.0V, I_OUT= 10mA ~ 100mA

V_IN= 5.0V, I_OUT= 100mA

V_IN= 5.0V, R_L= 0.1Ω

RESULTS

3.0mV = ±0.012%

0.022V = ±0.09%

500mV_P-P

Line Regulation

Load Regulation

Output Ripple

Short Circuit Current

Efficiency

910mA

V_IN= 5.0V, I_OUT= 100mA

62.2%

Output Ripple With Optional Filter

70mV_P-P

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MC34063A

LINEAR INTEGRATED CIRCUIT

EXTERNAL CURRENT BOOST CONNECTIONS FOR IC PEAK GREATER THAN 1.5A

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MC34063A

LINEAR INTEGRATED CIRCUIT

TYPICAL CHARACTERISTICS

Output Switch ON-OFF Time versus

Oscillator Timing Capacitor

Timing Capacitor Waveform

10³

10²

10¹

V_CC= 5.0V

Pin 7 = V_CC

Pin 5 = GND

T_A= 25℃

t_ON

V_CC= 5.0V

Pin 7 = V_CC

Pin 2 = GND

Pin 1,5,8 = Open

C_T= 1.0nF

T_A= 25℃

t_OFF

10⁰

10^-2

10^-1

Oscillator Timing Capacitor, C_T(nF)

10¹

10⁰

10μs/DIV

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MC34063A

LINEAR INTEGRATED CIRCUIT

DESIGN FORMULA TABLE

CALCULATION

STEP-DOWN

STEP-UP

VOLTAGE-INVERTING

t_ON

t_OFF

V_OUT+ V_F

V_IN- V_CE(SAT)

(t_ON+t_{OFF MAX}

)

F_MIN

C_T

I_SW

R_S

4x10^-5t_ON

2I_OUT(MAX)

0.3/I_SW

4x10^-5t_ON

0.3/I_SW

L_(MIN)

C_O

I_OUTt_ON

V_RIPPLE(P-P)

V_CE(SAT)

V_F

- Saturation voltage of the output switch.

- Forward voltage drop of the ringback rectifier.

The following power supply characteristics must be chosen:

V_IN

- Nominal input voltage.

V_OUT

I_OUT

F_MIN

- Desired output voltage, V_OUT=1.25(1+R₂/R₁)

- Desired output current.

- Minimum desired output switching frequency at the selected values for V_INand I_OUT

V_RIPPLE(P-P)- Desired peak-to-peak output ripple voltage. In practice, the calculated value will need to be increased

due to the capacitor equivalent series resistance and board layout. The ripple voltage should be kept

to a low value since it will directly effect the line and load regulation.

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.

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MC34063A_12 [UTC]

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