SDC7500BZ-G1 [SDC]

Voltage Mode PWM Controller;


型号：	SDC7500BZ-G1
厂家：	Shaoxing Devechip Microelectronics Co., Ltd
描述：	Voltage Mode PWM Controller
文件：	总10页 (文件大小：308K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Datasheet

Voltage Mode PWM Controller

General Description

SDC7500

Features

The SDC7500 is a voltage mode pulse width modulation

switching regulator control circuit designed primarily for

power supply control.



Complete PWM power control circuitry

Uncommitted outputs for 200mA sink or source

current



Output control for single ended or push pull

operation

The SDC7500 consists of a reference voltage circuit, two

error amplifiers, an on-chip adjustable oscillator, a

dead-time control (DTC) comparator, a pulse-steering

control flip-flop, and an output control circuit. The

precision of voltage reference (V_REF) is ±1% through

trimming and this provides a better output voltage

regulation. The SDC7500 provides for push-pull or

single-ended output operation, which can be selected

through the output control.

Internal regulator provides a stable 5V reference

supply with 5% tolerance

Adjustable dead-time control

Package: DIP-16



Applications



PC power supply

DC-DC convertor

DIP-16

Figure 1. Package Type

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Datasheet

Voltage Mode PWM Controller

Pin Configuration

SDC7500

Package: DIP-16

VIN1+

VIN2+

VIN2-

VREF

CTRL

VCC

VIN1-

COMP

DEAD

GND

Figure 2. Pin Configuration

Pin Name

Pin Number

Function

VIN1+

VIN1-

COMP

DEAD

Amplifier positive input

Amplifier negative input

Compensation pin

Dead time control

Oscillate capacitor pin, external timing capacitor

Oscillate resistor pin, external timing resistor

Ground

GND

Output transistor collector

Output transistor emitter

Output transistor collector

Power supply pin

VCC

CTRL

VREF

VIN1-

VIN2+

Output control pin

Reference pin

Amplifier negative input

Amplifier positive input

Table 1. Pin Configuration

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Datasheet

Voltage Mode PWM Controller

Functional Block Diagram

SDC7500

CTRL

OSC

DEAD

VIN+

PWM

ERR

VIN-

VREF

VCC

REF

VIN+

5.0V

VIN-

GND

COMP

Figure 3. Functional Block Diagram

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Datasheet

Voltage Mode PWM Controller

Ordering Information

SDC7500

SDC7500 X X

E1: Pb-free

G1: Halogen-free

Circuit Type

TR: Tape Reel

Blank: Tube

Reference

A:4.90V-4.99V

B:4.99V-5.08V

Package

DIP-16: Z

Part Number

Marking ID

Package

Temperature

Packing Type

Pb-free

Halogen-free

Pb-free

Halogen-free

SDC7500AZ -E1

SDC7500AZ -G1

SDC7500

SDC7500G

Tube

DIP-16

-40℃~85℃

SDC7500BZ -E1

SDC7500BZ -G1

SDC7500G

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Datasheet

Voltage Mode PWM Controller

SDC7500

Absolute Maximum Ratings (NOTE: Stresses greater than those listed under Absolute Maximum Ratings may cause

permanent damage to the device.)

Parameter

Power supply voltage VCC

Symbol

Value

Unit

V_CC

V_IN

V_OUT

I_CO

0.3

Amplifier input voltage

Collector output voltage

Collector output current

200

°C

Total dissipation power

P_D

1000

-40~150

-65~150

200

Operating Junction Temperature

Storage temperature

T_J

T_STG

°C

Latch-up test per JEDEC 78

ESD, HBM model per Mil-Std-883, Method 3015

ESD, MM model per JEDEC EIA/JESD22-A115

HBM

2000

200

Table 2. Absolute Maximum Ratings

Recommended Operating Conditions

Parameter

Symbol

Min

Max

Unit

Power supply voltage VCC

Frequency

V_CC

f_osc

1.0

-40

200

kHz

°C

Operating temperature

T_OPR

Table 3. Recommended Operating Conditions

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Datasheet

Voltage Mode PWM Controller

SDC7500

Electrical Characteristics (Ta=25°C, VCC=15.0V, unless otherwise specified.)

Parameter

Symbol

Conditions

Min

Typ Max Unit

Reference Section

Output voltage(SDC7500A)

Output voltage(SDC7500B)

Input regulation

4.90

4.99

5.08

V_REF

I_REF=1mA

4.99

V_{Delta_VV}

V_CC=7V~40V

Output regulation

V_{Delta_VL}

I_SC

I_REF=1mA~10mA

V_REF=0V, Ta=25°C

Ta=-25°C~85°C

Short-circuit output current

Output voltage change with temperature

0.2

Delta_VT

PWM Section

V_TH

Input threshold voltage

Input sink current

DUTY=0

4.5

I_SINK

V_COMP=0.7V

0.3

0.7

Oscillator Section

Frequency

f_OSC

CT=1nf, RT=12kΩ

kHz

ALL Value of CT RT

Ta constant

Standard deviation of frequency

Delta

Frequency change with temperature

Frequency change with voltage

Delta_FT

Delta_FV

Ta=-25°C~85°C

V_CC=7V~40V

0.1

Amplifier Section

Input offset voltage

V_OFFSET

I_OFFSET

I_BIAS

V_O(PIN3)=2.5V

V_COMP=0.5V

V_COMP=3.5V

V_CC=7V~40V

V_O=0.5V~3.5V

Input offset current

250

Input bias current

0.2

Output sink current

I_SINK

0.3

-2

0.7

Output source current

Common-mode input voltage range

Open-loop voltage amplification

Unity-gain bandwidth

I_SOURSE

V_IN

-0.3~V_CC

G_V

kHz

f_BAND

R_REJ

800

Common-mode rejection ratio

V_CC=40V

Dead Time Control Section

Input bias

I_BIAS

G_V

V_I=0V~5.25V

-2

-10

Maximum duty cycle

Input threshold voltage

V_I(PIN4)=0

DUTY=0

V_TH

2.7

3.3

DUTY=MAX

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Datasheet

Voltage Mode PWM Controller

Parameter

SDC7500

Symbol

Conditions

Min

Typ Max Unit

Power Current Section

Standby supply current

Average supply current

I_CC1

V_CC=15V

V_CC=40V

V_PIN4=2V

I_CC

I_AV

7.5

Output Section

V_CE=40V

V_CC=40V

_CC=V_C=40V

V_E=0

Collector off-state current

Emitter off-state current

I_C

100

I_E

-100

Common-emitter

Emitter-follower

V_SAT

I_IN

V_E=0, I_C=100mA

V_C=15V, I_E=-100mA

V_I=V_REF

1.0

1.5

1.3

2.5

3.5

Collector-emitter

saturation voltage

Output control input current

Switching Characteristics

Output voltage rise time

Output voltage fall time

Output voltage rise time

Output voltage fall time

t_r

t_f

t_r

t_f

100

200

100

200

100

Common-emitter

configuration

100

Emitter-follower

configuration

Table 4. Electrical Characteristics

Typical Performance Characteristics

Common-Emitter Configuration

10⁵

Emitter-Follower Configuration

100

CT=0.001uF

10⁴

CT=0.01uF

10³

CT=0.1uF

V_CC=15V

∆V=3V

Ta=25°C

10²

V_CC=15V

CT=1uF

Ta=0°C

70°C

10¹

10³

10²

10³

10⁴

10⁵

10⁶

10⁴

10⁵

10⁶

Frequency(Hz)

RT(timing resistance)(Ω)

Figure 4. Oscillator frequency and frequency

variation vs. Timing resistance

Figure 5. Amplifier voltage amplification

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Datasheet

Voltage Mode PWM Controller

SDC7500

Typical Application

V_IN

V_OUT+

V_OUT

Figure 6. Typical Application

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Datasheet

Voltage Mode PWM Controller

SDC7500

Package Dimension

DIP-16

Dimensions In Millimeters

Dimensions In Inches

Symbol

Min

Max

4.310

Min

Max

0.170

3.710

0.510

3.200

0.380

0.146

0.020

0.126

0.015

3.600

0.570

0.142

0.022

1.524(BSC)

2.540(BSC)

0.060(BSC)

0.100(BSC)

0.204

18.800

6.200

7.320

0.360

19.200

6.600

7.920

0.008

0.740

0.244

0.288

0.014

0.756

0.260

0.312

3.000

8.400

3.600

9.000

0.118

0.331

0.142

0.354

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Datasheet

Voltage Mode PWM Controller

SDC7500

Shaoxing Devechip Microelectronics Co., Ltd.

http://www.sdc-semi.com/

IMPORTANT NOTICE

Information in this document is provided solely in connection with Shaoxing Devechip Microelectronics Co., Ltd. (abbr. SDC) products.

SDC reserves the right to make changes, corrections, modifications or improvements, to this document, and the products and services

described herein at anytime, without notice. SDC does not assume any responsibility for use of any its products for any particular

purpose, nor does SDC assume any liability arising out of the application or use of any its products or circuits. SDC does not convey

any license under its patent rights or other rights nor the rights of others.

Headquarters of Shaoxing

Address: Tian Mu Road, No13,

Shaoxing city, Zhejiang province, China

Zip code: 312000

Shenzhen Branch

Address: 22A, Shangbu building, Nan Yuan Road, No.68,

Futian District, Shenzhen city, Guangdong province, China

Zip code: 518031

Tel: (86) 0575-8861 6750

Tel: (86) 0755-8366 1155

Fax: (86) 0575-8862 2882

Fax: (86) 0755-8301 8528

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