UC3724DWTR [TI]

Isolated Drive Transmitter;


型号：	UC3724DWTR
厂家：	TEXAS INSTRUMENTS
描述：	Isolated Drive Transmitter
文件：	总5页 (文件大小：282K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

UC1724

UC2724

UC3724

Isolated Drive Transmitter

FEATURES

DESCRIPTION

• 500mA Output Drive, Source or Sink

The UC1724 family of Isolated Drive Transmitters, along with the UC1725

Isolated Drivers, provide a unique solution to driving isolated power

MOSFET gates. They are particularly suited to drive the high-side devices

on a high-voltage H-bridge. The UC1724 devices transmit drive logic, and

drive power, to the isolated gate circuit using a low cost pulse transformer.

• 8 to 35V Operation

• Transmits Logic Signal Instantly

• Programmable Operating Frequency

• Under-Voltage Lockout

This drive system utilizes a duty-cycle modulation technique that gives in-

stantaneous response to the drive control transistions, and reliably passes

steady-state, or DC, conditions. High frequency operation, up to 600kHz,

allows the cost and size of the coupling transformer to be minimized.

• Able To Pass DC Information Across

Transformer

These devices will operate over an 8 to 35 Volt supply range. The dual high

current totem pole outputs are disabled by an uder-voltage lockout circuit to

prevent spurious responses during startup or low voltage conditions.

• Up To 600kHz Operation

These devices are available in 8 pin plastic or ceramic dual-inline pack-

ages, as well as 16 pin SOIC package.

BLOCK DIAGRAM

UDG-92037

Note: Pin numbers refer to DIL-8 packages.

04/99

UC1724

UC2724

UC3724

CONNECTION DIAGRAMS

ABSOLUTE MAXIMUM RATINGS

Supply Voltage V_IN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V

Source/Sink Current (Pulsed) . . . . . . . . . . . . . . . . . . . . . . . . 1A

Source/Sink Current (Continuous) . . . . . . . . . . . . . . . . . . . 0.5A

DIL-8 (Top View)

J Or N Package

Ouput Voltage (Pins 4, 6). . . . . . . . . . . . . . . –0.3 to (V_IN0.3)V

PHI, RT, and CT inputs (Pins 1, 7, and 8) . . . . . . . . . –0.3 to 6V

Operating Junction Temperature (Note 2) . . . . . . . . . . . . 150°C

Storage Temperature Range . . . . . . . . . . . . . . –65°C to 150°C

Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . 300°C

Note 1: All voltages are with respect to GND (Pin 2); all cur-

rents are positive into, negative out of part.

Note 2: Consult Unitrode Integrated Circuit Databook for ther-

mal limitations and considerations of package.

Note 3: Pin numbers refer to DIL-8 packages.

SOIC-16 (Top View)

DW Package

RECOMMENDED OPERATION CONDITIONS

Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +9V to +35V

Sink/Source Load Current (each output). . . . . . . . . 0 to 500mA

Timing Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . 2kW to 10kW

Timing Capacitor . . . . . . . . . . . . . . . . . . . . . . . . . 300pF to 3nF

Operating Temperature Range (UC1724) . . . –55°C<T_A<125°C

Operating Temperature Range (UC3724) . . . . . . 0°C<T_A<70°C

Note 4: Range over which the device is functional and

parameter limits are guaranteed.

ORDERING INFORMATION

TEMPERATURE RANGE

–55°C to +125°C

PACKAGE

CDIP

UC1724J

UC2724DW

UC2724N

UC3724DW

UC3724N

–25°C to +85°C

SOIC-Wide

PDIP

0°C to +70°C

SOIC-Wide

PDIP

ELECTRICAL CHARACTERISTICS: Unless otherwise stated, V_CC= 20V, R_T= 4.3kΩ, C_T= 1000pF, no load on any

output and these specifications apply for: –55^oC < T_A< 125^oC for the UC1724, –25^oC < T_A< 85^oC for the UC2724, and

0^oC < TA < 70^oC for the UC3724. T_A=T_J.

PARAMETER

Under-Voltage Lockout

TEST CONDITIONS

MIN

TYP

MAX UNITS

Start-Up Threshold

Threshold Hysteresis

Retriggerable One-Shot

Initial Accuracy

_INRising

7.75

1.0

9.5

1.5

0.4

T_J= 25°C

1.54

1.0

1.9

2.25

2.9

µs

Temperature Stability

Voltage Stability

Over Operating T_J

V_IN= 10 to 35V

0.2

0.5

%/V

kHz

Operating Frequency

Minimum Pulse Width

Operating Frequency

L_LOAD= 1.4mH

100

500

150

500

750

200

1200

1100

RT = 2k CT = 300pF

RT = 2k CT = 300pF L_LOAD= 1.4mH

kHz

UC1724

UC2724

UC3724

ELECTRICAL CHARACTERISTICS: Unless otherwise stated, V_CC= 20V, R_T= 4.3kΩ, C_T= 1000pF, no load on any

output and these specifications apply for: –55^oC < T_A< 125^oC for the UC1724, –25^oC < T_A< 85^oC for the UC2724, and

0^oC < TA < 70^oC for the UC3724. T_A=T_J.

PARAMETER

Phi Input (Control Input)

TEST CONDITIONS

MIN

TYP

MAX UNITS

HIGH Input Voltage

LOW Input Voltage

HIGH Input Current

LOW Input Current

Delay to One-Shot

Delay to Output

2.0

0.8

V_IH= 2.4V

–220 –130

–600 –300

µA

V_IL= 0.4V

350

250

Output Drivers

Output Low Level

I_SINK= 50mA

0.3

0.5

1.5

1.7

0.4

2.1

2.5

I_SINK= 250mA

I_SOURCE= 50 mA

I_SOURCE= 250 mA

No load

Output High Level (Volts Below V_CC

)

Rise/Fall Time

Total Supply Current

Supply Current

C_T= 1.4V

Additional Information

Please refer to the following Unitrode application topics.

[1] Application Note U-127, Unique Chip Pair Simplified

Isolated High-Side Switch Drive by John A. O’Connor.

[2] Design Note DN-35, IGBT Drive Using MOSFET Gate

Drivers by John A. O’Conner.

UDG-92038

Figure 1. Typical application

UNITRODE CORPORATION

7 CONTINENTAL BLVD. • MERRIMACK, NH 03054

TEL. (603) 424-2410 FAX (603) 424-3460

PACKAGE OPTION ADDENDUM

www.ti.com

18-Sep-2008

PACKAGING INFORMATION

Orderable Device

Status ⁽¹⁾

Package Package

Pins Package Eco Plan ⁽²⁾Lead/Ball Finish MSL Peak Temp ⁽³⁾

Qty

Type

CDIP

PDIP

SOIC

CDIP

PDIP

Drawing

UC1724J

UC2724J

OBSOLETE

TBD

Call TI

UC2724N

UC3724DW

UC3724DWTR

UC3724J

UC3724N

⁽¹⁾The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in

a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

(2)

Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check

http://www.ti.com/productcontent for the latest availability information and additional product content details.

TBD: The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements

for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered

at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.

Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and

package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS

compatible) as defined above.

Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame

retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)

(3)

MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder

temperature.

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In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI

to Customer on an annual basis.

Addendum-Page 1

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UC3724DWTR [TI]

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