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APEX

SA57A Datasheet Preview

SA57A Datasheet

Switching Amplifier

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SA57A
SAS5A75A7A
Switching Amplifier
FEATURES
♦ Low cost intelligent switching amplifier
♦ Directly connects to most embedded Micro-
controllers and Digital Signal Controllers
♦ Integrated gate driver logic with dead-time
generation and shoot-through prevention
♦ Wide power supply range (8.5V to 60V)
♦ Over 15A peak output current per phase
♦ Independent current sensing for each output
♦ User programmable cycle-by-cycle current
limit protection
♦ Over-current and over-temperature warning
signals
APPLICATIONS
♦ Bidirectional DC brush motors
♦ 2 unidirectional DC brush motors
♦ 2 independent solenoid actuators
♦ Stepper motors
DESCRIPTION
The SA57A is a fully integrated switching amplifier de-
signed primarily to drive DC brush motors. Two inde-
pendent half bridges provide over 15 amperes peak
output current under microcontroller or DSC control.
Thermal and short circuit monitoring is provided, which
generates fault signals for the microcontroller to take
appropriate action. A block diagram is provided in Fig-
ure 1.
Additionally, cycle-by-cycle current limit offers user
programmable hardware protection independent of
the microcontroller. Output current is measured using
an innovative low loss technique. The SA57A is built
using a multi-technology process allowing CMOS logic
control and complementary DMOS output power de-
vices on the same IC. Use of P-channel high side FETs
enables 60V operation without bootstrap or charge
pump circuitry.
The HSOP surface mount package balances excellent
thermal performance with the advantages of a low pro-
file surface mount package.
SC
TEMP
ILIM/D IS 1
I1
I2
D IS 2
PWM
Signals
1t
1b
2t
2b
SGND
FIGURE 1. BLOCK DIAGRAM
VS +
VDD
V S1
Fault
Logic
I1'
I2'
VDD
VS 2
VDD
Control
Logic
Gate
Control
Phase 1
Phase 2
I1' I2'
Out 1
Out 2
SA57A Switching Amplifier
PGND 1
GND
PGND 2
SwAw5w7.Uapexanalog.com
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
SA5O7CUTR2E0V1F21




APEX

SA57A Datasheet Preview

SA57A Datasheet

Switching Amplifier

No Preview Available !

SA57A
1. CHARACTERISTICS AND SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
SUPPLY VOLTAGE
SUPPLY VOLTAGE
LOGIC INPUT VOLTAGE
VS
VDD
OUTPUT CURRENT, peak, 10ms (Note 2)
POWER DISSIPATION, avg, 25ºC (Note 2)
TEMPERATURE, junction
(Note 3)
TEMPERATURE RANGE, storage
OPERATING TEMPERATURE, case
SPECIFICATIONS
IOUT
PD
TJ
TSTG
TA
Parameter
Test Conditions2
LOGIC
INPUT LOW
INPUT HIGH
OUTPUT LOW
OUTPUT HIGH
OUTPUT CURRENT
(SC, Temp, ILIM/DIS1)
POWER SUPPLY
VS
VS UNDERVOLTAGE LOCKOUT,
(UVLO)
VDD
SUPPLY CURRENT, VS
SUPPLY CURRENT, VDD
CURRENT LIMIT
20 kHz (One phase switching at
50% duty cycle) , VS=50V, VDD=5V
20 kHz (One phase switching at
50% duty cycle) , VS=50V, VDD=5.5V
CURRENT LIMIT THRESHOLD (Vth)
Vth HYSTERESIS
OUTPUT
CURRENT, CONTINUOUS
25ºC Case Temperature
RISING DELAY, TD (RISE)
See Figure 10
FALLING DELAY, TD (FALL)
See Figure 10
DISABLE DELAY, TD (DIS)
See Figure 10
ENABLE DELAY, TD (DIS)
See Figure 10
RISE TIME, T (RISE)
FALL TIME, T (FALL)
See Figure 11
See Figure 11
ON RESISTANCE SOURCING
(P-CHANNEL)
5A Load
ON RESISTANCE
SINKING (N-CHANNEL)
5A Load
Min
(-0.5)
−65
−40
Min
1.8
3.7
UVLO
4.5
8
Max
60
5.5
(VDD+0.5)
17
100
150
125
125
Units
V
V
V
A
W
°C
°C
°C
Typ Max Units
1V
V
0.3 V
V
50 mA
50 60
V
9V
5.5 V
25 30 mA
5 6.5 mA
3.95
100
270
270
200
200
50
50
300 600
250 600
V
mV
A
ns
ns
ns
ns
ns
ns
mΩ
mΩ
2 SA57U


Part Number SA57A
Description Switching Amplifier
Maker APEX
PDF Download

SA57A Datasheet PDF






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