TI Intros DRV59x Family of PWM Power Drivers
Texas Instruments Inc. (TI, Dallas, TX) introduced two high-efficiency, pulse-width modulation (PWM) power drivers and an H-bridge that eliminates the need for large heatsinks required by most linear solutions. The DRV59x family allows designers to shrink solutions more than 80 percent and the devices only take up a 9mm x 9mm footprint in the PQFQ package.
The DRV590 and DRV591 (1.2A and 3A, respectively) high-efficiency PWM power drivers possess a 2.8V to 5.5V voltage supply range. The DRV592, a 3A high-efficiency H-bridge, may be driven from any external PWM generator with TTL logic outputs, such as a DSP, a micro-controller or an FPGA. All devices are internally protected against overheating and current overloads.
Logic-level fault indicators signal when the device junction temperature has reached approximately 130 degrees C, allowing for system-level shutdown before the power driver's internal thermal shutdown circuitry activates. The fault indicators also signal when an over-current event has occurred. If the over-current circuitry is tripped it will automatically reset when the device returns to its normal operating range.
The DRV590, DRV591 and DRV592 are available now in a standard PowerPAD surface-mount, 20-pin SOIC. The DRV591 and DRV592 are available in a PowerPAD surface-mount, 32-pin PQFQ package. Pricing in quantities of 1,000 is $6.87 for the DRV590, $12.34 for the DRV591 and $11.89 for the DRV592.
