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TL1454, TL145404, TL145406

Table of contents:
Info of TL1454
Info of TL145404
Info of TL145406

TL1454, TL145404, TL145406 Selling Leads, Datasheet

MFG:TI Package Cooled:07+ D/C:SMD

TL1454, TL145404, TL145406 Datasheet download

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Part Number: TL1454

MFG: TI

Package Cooled: 07+

D/C: SMD

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TL1454 General Description

The TL1454 is a dual-channel pulse-width-modu-lation (PWM) control circuit, primarily intended for low-power, dc/dc converters. Applications include LCD displays, backlight inverters, notebook computers, and other products requiring small, high-frequency, dc/dc converters. Each PWM channel has its own error amplifier, PWM comparator, dead-time control comparator, and MOSFET driver. The voltage reference,oscillator, undervoltage lockout, and short-circuit protection are common to both channels.

Channel 1 is configured to drive n-channel MOSFETs in step-up or flyback converters, and channel 2 is configured to drive p-channel MOSFETs in step-down or inverting converters. The operating frequency is set with an external resistor and an external capacitor, and dead time is continuously adjustable from 0 to 100% duty cycle with a resistive divider network. Soft start can be implemented by adding a capacitor to the dead-time control (DTC) network. The error-amplifier common-mode input range includes ground, which allows the TL1454 to be used in ground-sensing battery chargers as well as voltage converters.

TL1454 Maximum Ratings

Supply voltage, V_CC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 V
Error amplifier input voltage: IN1+, IN1, IN2+, IN2 . . . . . . . . . . . . . . . . . . . . .. . . . . . . 23 V
Output voltage: OUT1, OUT2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 20 V
Continuous output current: OUT1, OUT2 . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .±200 mA
Peak output current: OUT1, OUT2 . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . .1 A
Continuous total dissipation . . . . . . . . . . . . . . . . . . . . . . . . .. . .. See Dissipation Rating Table
Operating free-air temperature range, T_A: C suffix . . . . . . . . . . . . . .. . . . . . . . 20°C to 85°C
I suffix . . . . . . . . . . . . . .. . . . . . . . 40°C to 85°C
Storage temperature range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . .. . . . . . . . 260°C
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to network GND.

TL1454 Connection Diagram

TL145406 General Description

The TL145406 is a bipolar device containing three independent drivers and receivers that are used to interface data terminal equipment (DTE) with data circuit-terminating equipment (DCE). The drivers and receivers of the TL145406 are similar to those of the SN75188 quadruple driver and SN75189A quadruple receiver, respectively. The pinout matches the flow-through design of the SN75C1406 to reduce the board space required and to allow easy interconnection. The bipolar circuits and processing of the TL145406 provide a rugged low-cost solution for this function at the expense of quiescent power and external passive components relative to the SN75C1406.

The TL145406 complies with the requirements of TIA/EIA-232-F and ITU (formerly CCITT) V.28 standards. These standards are for data interchange between a host computer and peripheral at signaling rates up to 20 kbit/s. The switching speeds of the TL145406 are fast enough to support rates up to 120 kbit/s with lower capacitive loads (shorter cables). Interoperability at the higher signaling rates cannot be assured unless the designer has design control of the cable and of the interface circuits at both ends. For interoperability at signaling rates to 120 kbit/s, use of TIA/EIA-423-B (ITU V.10) and TIA/EIA-422-B (ITU V.11) standards is recommended. The TL145406 is characterized for operation from 0to 70.

TL145406 Maximum Ratings

Supply voltage (see Note 1): V_{CC ............................................................}10 V
                                               V_{DD ...........................................................}15 V
                                               V_SS .........................................................15 V
Input voltage range: Driver .........................................................15 V to 7 V
                                  Receiver ...................................................30 V to 30 V
Driver output voltage range .......................................................15 V to 15 V
Receiver low-level output current ............................................................20 mA
Package thermal impedance, JA (see Note 2): DW package ................57/W
                                                                           N package ...................67/W
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds ..............260
Storage temperature range, T_stg ................................................65to 150
† Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the
    device. These are stress ratings only, and functional operation of the device at these or any other
    conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure
    to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. All voltages are with respect to the network ground terminal.
             2. The package thermal impedance is calculated in accordance with JESD 51-7.

TL145406 Features

·Meets or Exceeds the Requirements of ANSI TIA/EIA-232-F and ITU V.28
·Designed to Support Data Rates up to 120 kbit/s Over 3-m Cable
·ESD Protection Exceeds 5 kV on All Pins
·Flow-Through Design
·Wide-Driver Supply Voltage . . . ±7.5 V to±15 V
·Functionally Interchangeable With Motorola MC145406 and Texas Instruments SN75C1406

TL145406 Connection Diagram

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