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MC34063のメーカーはETCです、この部品の機能は「DC/DC CONVERTER CONTROL CIRCUIT」です。 |
部品番号 | MC34063 |
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部品説明 | DC/DC CONVERTER CONTROL CIRCUIT | ||
メーカ | ETC | ||
ロゴ | |||
このページの下部にプレビューとMC34063ダウンロード(pdfファイル)リンクがあります。 Total 11 pages
MC34063
DC/DC CONVERTER CONTROL CIRCUIT
Description
The MC34063 is a monolithic
control circuit containing the primary
functions required for DC/DC converters.
The device consists of an internal
temperature compensated reference,
comparator, controlled duty cycle oscillator
with an active current limit circuit, driver
and high current output switch. This device
is specifically designed to be incorporated
in stepdown, step-up and voltage-inverting
applications with a minimum number of
external components. The ±2% internal
reference and low quiescent current of
1.6mA are among the improvements of the
device over the competition
Features
3V to 30V Input Voltage Operation.
Internal 1.2A Peak Current Switch.
Internal ±2% Reference.
Low Quiescent Current at 1.6mA.
Frequency Operation from 100Hz to
100KHz.
Low Dropout Operation: 100% Duty
Cycle
Current Limiting.
Standard SOP8/DIP8 Packages
Applications
DC-DC Converter Module
ADSL Modems
Hub.
Battery Chargers
Functional Diagram
Ver1.0
1
1 Page MC34063
Electrical Characteristics (Vcc= 5V, Ta=25°C (unless otherwise specified.)
Parameter
Oscillator
Test Condictions
Frequency
VPIN5 = 0V ,CT = 1nF
Charging Current
5.0V~VCC~30V
Discharge Current
5.0V~VCC~30V
Voltage Swing
PIN 3
Discharge to Charge Current
Ratio
VIPK(SENSE) =VCC
Symbol
MIN. TYP. MAX. Unit
fOSC
24
ICHG
IDISCHG
24
140
VOSC
I IDISCHG/ CHG
35 46 KHZ
35 46 µA
220 260 µA
0.6 V
6.0
Current Limit Sense Voltage
Output Switch
I ICHG= DISCHG
Saturation Voltage, Darlington ISW=1.0A;
Connection
V VC(DRIVER)= C(SWITCH)
Saturation Voltage
ISW=1.0A; IC(DRIVER)=50mA
(Forced ~~20)
DC Current Gain
Collector Off-State Current
ISW=1.0A; VCE=5.0V
VCE=30V
Comparator
Threshold Voltage
Threshold Voltage
0°C~Ta~70°C
VIPK(SENSE)
250 300 400
VCE(SAT)
1.0 1.3
VCE (SAT)
0.45 0.7
hFE
IC(OFF)
50 75
10
VFB 1.225 1.25 1.275
1.19 1.31
mV
V
V
nA
V
V
Threshold Voltage Line
Regulation
3.0V~VCC~30V
REGLINE
0.1 0.3 mV/V
Input Bias Current
Supply current
VIN=0V
VIPK(SENSE)=VCC
VPIN 5>VFB
5.0V~VCC~30V
CT=0.001µF, PIN 2=GND
Remaining pins open
IIB
ICC
0.4 1 µA
1.6 3 mA
Ver1.0
3
3Pages MC34063
Application Examples
Line Regulation
Load Regulation
Short Circuit Current
VIN = 10V ~20V @ IO=500mA
VIN = 15V, @ IO=10mA ~ 500mA
VIN =15V, @ RL = 0.1Ω
Fig.1 Step-Down converter
40mV
5mV
1.3A
Fig.2 Step-Down converter with External PNP Saturation Switch
Ver1.0
6
6 Page | |||
ページ | 合計 : 11 ページ | ||
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PDF ダウンロード | [ MC34063 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
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