TL494CDR TL494CN Power Path Management IC Switching Controllers PWM Controller
microchip battery management
,power management integrated circuit
TL494CDR TL494CN Power Path Management IC Switching Controllers PWM Controller
1 Features
- Complete PWM Power-Control Circuitry
-
Uncommitted Outputs for 200-mA Sink or
Source Current
-
Output Control Selects Single-Ended or Push-Pull Operation
-
Internal Circuitry Prohibits Double Pulse at Either Output
-
Variable Dead Time Provides Control Over Total Range
-
Internal Regulator Provides a Stable 5-V Reference Supply With 5% Tolerance
-
Circuit Architecture Allows Easy Synchronization
2 Applications
-
Desktop PCs
-
Microwave Ovens
-
Power Supplies: AC/DC, Isolated, With PFC, > 90 W
-
Server PSUs
-
Solar Micro-Inverters
-
Washing Machines: Low-End and High-End
-
E-Bikes
-
Power Supplies: AC/DC, Isolated, No PFC, < 90 W
-
Power: Telecom/Server AC/DC Supplies: Dual Controller: Analog
-
Smoke Detectors
-
Solar Power Inverters
3 Description
The TL494 device incorporates all the functions required in the construction of a pulse-width- modulation (PWM) control circuit on a single chip. Designed primarily for power-supply control, this device offers the flexibility to tailor the power-supply control circuitry to a specific application.
The TL494 device contains two error amplifiers, an on-chip adjustable oscillator, a dead-time control (DTC) comparator, a pulse-steering control flip-flop, a 5-V, 5%-precision regulator, and output-control circuits.
The error amplifiers exhibit a common-mode voltage range from –0.3 V to VCC – 2 V. The dead-time control comparator has a fixed offset that provides approximately 5% dead time. The on-chip oscillator can be bypassed by terminating RT to the reference output and providing a sawtooth input to CT, or it can drive the common circuits in synchronous multiple-rail power supplies.
The uncommitted output transistors provide either common-emitter or emitter-follower output capability. The TL494 device provides for push-pull or single- ended output operation, which can be selected through the output-control function. The architecture of this device prohibits the possibility of either output being pulsed twice during push-pull operation.
The TL494C device is characterized for operation from 0°C to 70°C. The TL494I device is characterized for operation from –40°C to 85°C.
Device Information
|
PART NUMBER |
PACKAGE (PIN) |
BODY SIZE |
|
TL494 |
SOIC (16) |
9.90 mm × 3.91 mm |
|
PDIP (16) |
19.30 mm × 6.35 mm |
|
|
SOP (16) |
10.30 mm × 5.30 mm |
|
|
TSSOP (16) |
5.00 mm × 4.40 mm |
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