ST STA533WF User Manual

18-volt, 3-amp, quad power half-bridge

Features

■ Multipower BCD technology

■ Low input/output pulse width distortion

■ 200-mΩ R

stage

■ CMOS-compatible logic inputs

■ Thermal protection

■ Thermal warning output

■ Undervoltage protection

■ Short-circuit protection

Description

The STA533WF is a monolithic quad half-bridge
stage in multipower BCD technology. The device
can be used as a dual bridge or reconfigured, by
connecting pin CONFIG to pins VDD, as a single
bridge with double-current capability.

The device is designed for the output stage of a
stereo Full Flexible Amplifier (FFX™). It is
capable of delivering 10 W x 4 channels into 4-Ω

Table 1. Device summary

complementary DMOS output

dsON

STA533WF

PowerSSO36 package
with exposed pad down

loads with 10% THD at V
single-ended configuration.

It can also deliver 20 W + 20 W into 8-Ω loads
with 10% THD at V

= 18 V in BTL configuration

CC

or, in single parallel BTL configuration, 40 W into
a 4-Ω load with 10% THD at V

The input pins have a threshold proportional to
the voltage on pin VL.

The STA533WF comes in a 36-pin PowerSSO
package with exposed pad down (EPD).

=18V in

CC

= 18 V.

CC

Order code Temperature range Package Packaging

STA533WF 0 to 70 °C PowerSSO36 EPD Tube

STA533WF13TR 0 to 70 °C PowerSSO36 EPD Tape and reel

June 2011 Doc ID 17658 Rev 2 1/15

www.st.com

15

Pin description STA533WF

1 Pin description

Figure 1. Pin out

Table 2. Pin list

GNDSUB

OUT2B
OUT2B

VCC2B
GND2B
GND2A

VCC2A

OUT2A

OUT2A

OUT1B

OUT1B

VCC1B
GND1B
GND1A

VCC1A

OUT1A

OUT1A

N.C.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

STA533WF

36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19

Pin Name Type Description

1 GNDSUB PWR Substrate ground

2, 3 OUT2B O Output half-bridge 2B

4 VCC2B PWR Positive supply

VCCSIG
VCCSIG
VSS
VSS
IN2B
IN2A
IN1B
IN1A
THWARN
FAU LT
TRISTATE
PWRDN
CONFIG
VL
VDD
VDD
GNDREG
GNDCLEAN

5 GND2B PWR Negative supply

6 GND2A PWR Negative supply

7 VCC2A PWR Positive supply

8, 9 OUT2A O Output half-bridge 2A

10, 11 OUT1B O Output half-bridge 1B

12 VCC1B PWR Positive supply

13 GND1B PWR Negative supply

14 GND1A PWR Negative supply

15 VCC1A PWR Positive supply

16, 17 OUT1A O Output half-bridge 1A

18 N.C. - No internal connection

19 GNDCLEAN PWR Logical ground

20 GNDREG PWR Filtering for regulator; this is an internally generated ground for V

21, 22 VDD PWR 5-V regulator referred to ground

23 VL PWR High logical state setting voltage, V

2/15 Doc ID 17658 Rev 2

DD

L

STA533WF Pin description

Table 2. Pin list (continued)

Pin Name Type Description

Configuration pin:

24 CONFIG I

25 PWRDN I

26 TRISTATE I

27 FAULT O

28 THWARN O

29 IN1A I Input of half-bridge 1A

30 IN1B I Input of half-bridge 1B

0: normal operation
1: bridges in parallel, see Parallel-output and high-current operation

on page 8

Stand-by pin:
0: low-power mode

1: normal operation

Hi-Z pin:
0: all power amplifier outputs in high-impedance state

1: normal operation

Fault pin advisor (open-drain device, needs pull-up resistor):
0: fault detected (short circuit or thermal, for example)

1: normal operation

Thermal-warning advisor (open-drain device, needs pull-up
resistor):

o

0: temperature of the IC >130

C

1: normal operation

31 IN2A I Input of half-bridge 2A

32 IN2B I Input of half-bridge 2B

33, 34 VSS PWR 5-V regulator referred to +V

CC

35, 36 VCCSIG PWR Filtering for regulator, this is an internally generated supply for V

SS

Doc ID 17658 Rev 2 3/15

Electrical characteristics STA533WF

2 Electrical characteristics

Table 3. Absolute maximum ratings

Symbol Parameter Value Unit

V

CC

V

Lmax

V

inputs

V

config

T

stg

Table 4. Recommended operating conditions

DC supply voltage (Pins 4, 7, 12, 15) 23 V

Voltage on pin 23 4.0 V

Voltage on pins 25, 26, 29 to 32 -0.3 to VL + 0.3 V

Voltage on pins 24 -0.3 to VDD + 0.3 V

, TjStorage and junction temperature -40 to 150 °C

Symbol Parameter Min Typ Max Unit

V

CC

V

L

T

amb

Table 5. Thermal data

DC supply voltage (Pins 4, 7, 12, 15) 5.0 - 18 V

Input logic reference 2.7 3.3 3.6 V

Ambient temperature 0 - 70 °C

Symbol Parameter Min Typ Max Unit

T

j-case

T

jSD

T

warn

t

hSD

Thermal resistance junction to case (thermal pad) - - 1.5 °C/W

Thermal shut-down junction temperature - 150 - °C

Thermal warning temperature - 130 - °C

Thermal shut-down hysteresis - 25 - °C

Unless otherwise stated, the test conditions for Ta bl e 6 below are VL = 3.3 V, VCC = 18 V,
R

=8Ω, fSW = 384 kHz and T

L

Table 6. Electrical characteristics

Symbol Parameter Test conditions Min Typ Max Unit

P

R

I

dss

g

N

g

P

OUT

dsON

Output power in BTL mode THD+N > 10% - 20 - W

Power P-channel/N-channel
MOSFET on resistance

Power P-channel/N-channel
leakage

Power P-channel R
matching

Power N-channel R
matching

Dt_s Low current dead time (static) see Figure 2 - 5 10 ns

4/15 Doc ID 17658 Rev 2

amb

dsON

dsON

= 25 °C.

= 1 A - 180 230 mΩ

I

dd

- --10μA

I

= 1 A 95--%

dd

= 1 A 95--%

I

dd

STA533WF Electrical characteristics

Table 6. Electrical characteristics (continued)

Symbol Parameter Test conditions Min Typ Max Unit

Dt_d

t

d_ON

t

d OFF

t

r

t

f

V

IN-Low

V

IN-High

I

IN-H

I

IN-L

I

PWRDN-H

V

Low

V

High

High current dead time
(dynamic)

L = 22 μH, C = 470 nF

= 8 Ω, Idd = 2.0 A

R

L

see Figure 3

- 1020ns

Turn-on delay time Resistive load - 40 60 ns

Turn-off delay time Resistive load - 40 60 ns

Rise time

Fall time

Half-bridge input, low-level
voltage

Half-bridge input, high-level
voltage

High-level input current VIN = V

Resistive load
see Figure 2

Resistive load
see Figure 2

-

-

L

- 8 10 ns

- 8 10 ns

/ 2 -

V

-

VL / 2 +
300 mV

-

-

L

300 mV

-

V

V

-1-μA

Low-level input current VIN = 0.3 V - 1 - μA

High level PWRDN pin input
current

Low logical state voltage
(pins PWRDN, TRISTATE)

High logical state voltage
(pins PWRDN, TRISTATE)

= 3.3 V - 35 - μA

V

L

= 3.3V --0.8V

V

L

V

= 3.3 V 1.7 - - V

L

I

VCC-

PWRDN

I

FAULT

I

VCC-HiZ

I

VCC

I

OCP

V

UVP

t

pw_min

Supply current from VCC in
power down mode

V

= 0 V --10µA

PWRDN

Output current on pins
FAULT, THWARN with fault

= 3.3V -1-mA

V

pin

condition

Supply current from VCC in
3-state

V

TRISTATE

= 0 V - 22 - mA

Input pulse width

Supply current from VCC in
operation (both channels
switching)

= 50% duty,
switching frequency

= 384 kHz,

-50-mA

no LC filters

Overcurrent protection
threshold (short-circuit current

-3.04.0-A

limit)

Undervoltage protection
threshold

--3.54.3V

Output minimum pulse width No load 70 - 150 ns

Doc ID 17658 Rev 2 5/15