ST STA533WF 18-volt, 3-amp, quad power half-bridge Data Sheet
Summary
The STA533WF is a high-performance monolithic quad half-bridge amplifier designed for robust audio output stages. Featuring advanced multipower BCD technology, it delivers significant power into various loads while incorporating crucial protection functions, including thermal and short-circuit safeguards. This manual provides professional engineers with comprehensive specifications, operational parameters, pin descriptions, and electrical characteristics needed to effectively integrate this powerful component into their next audio system design.
Page 1 Text Content
STA533WF
18-volt, 3-amp, quad power half-bridge
Features Multipower BCD technology Low input/output pulse width distortion 200-mΩ Rds ON complementary DMOS output stage CMOS-compatible logic inputs Thermal protection Thermal warning output
Power SSO36 package Undervoltage protection with exposed pad down
Short-circuit protection
loads with 10% THD at VCC V in single-ended configuration.
Description
It can also deliver 20 W + 20 W into 8-Ω loads
The STA533WF is a monolithic quad half-bridge
with 10% THD at VCC = V in BTL configuration
stage in multipower BCD technology. The device
or, in single parallel BTL configuration, 40 W into
can be used as a dual bridge or reconfigured, by
a 4-Ω load with 10% THD at VCC = 18 V.
connecting pin CONFIG to pins VDD, as a single
The input pins have a threshold proportional to
bridge with double-current capability.
the voltage on pin VL.
The device is designed for the output stage of a
The STA533WF comes in a 36-pin Power SSO
stereo Full Flexible Amplifier (FFX™). It is
package with exposed pad down (EPD).
capable of delivering 10 W x 4 channels into 4-Ω
Table 1. Device summary Order code Temperature range Package Packaging
STA533WF 0 to 70 °C Power SSO36 EPD Tube STA533WF13TR 0 to 70 °C Power SSO36 EPD Tape and reel
June 2011 Doc ID 17658 Rev 2 1/15
www.st.com
Page Summary Contents For ST STA533WF 18-volt, 3-amp, quad power half-bridge Data Sheet
Manual Details
| Brand | QUAD |
|---|---|
| Pages | 15 |
| File Size | 252.60 KB |
| Published | June 04, 2026 |
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Frequently Asked Questions
What is the maximum output power in BTL mode?
The device can deliver up to 40 W into a 4-Ω load with 10% THD at V = 18 V.
How can I reconfigure the STA533WF?
It can be used as a dual bridge, or reconfigured by connecting pin CONFIG to pins VDD for single parallel BTL configuration.
What are the recommended operating conditions and temperature range?
The ambient temperature range is 0 to 70 °C, with absolute maximum junction temperature up to 150 °C.
Are there connections for fault status or thermal warning?
Yes, it includes 'FAULT' (pin 27) and 'THWARN' (pin 28) pins. Both are open-drain devices requiring a pull-up resistor.