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FEATURES
• LOW COST
• WIDE BANDWIDTH - 1.1 Mhz
• HIGH OUTPUT CURRENT - 1A PER AMPLIFIER
• WIDE COMMON MODE RANGE Includes negative supply
• WIDE SUPPLY VOLTAGE RANGE Single supply: 5V to
40V Split supplies: ± 2.5V to ± 20V
• LOW QUIESCIENT CURRENT
• VERY LOW DISTORTION
20-PIN PSOP
PACKAGE STYLE DK
against thermal overloads. Care must be exercised to observe
the Safe Operating Area (SOA) curve and proper heatsinking
will ensure maximum reliability.
The wide common mode input range includes the nega-
tive rail, facilitating single supply applications. This makes it
possible to have a ground-based input driving a single supply
amplifier with ground acting as the second or bottom supply
of the amplifier.
FIGURE 2.
Bi-directional speed control from a single supply
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APPLICATIONS
• HALF AND FULL BRIDGE MOTOR DRIVERS
• AUDIO POWER AMPLIFIER
Stereo
- 11.3W RMS per amplifier
Bridge
- 22.6W RMS per two amplifiers
Two Bridges - 45.2W RMS per package
• 3 PHASE MOTOR DRIVER
3 Channels - 33.9W RMS per package
• IDEAL FOR SINGLE SUPPLY SYSTEMS
5V
- Peripherals
12V
- Automotive
28V
- Avionic
• PACKAGING OPTIONS
20-Pin PSOP, JEDEC MO-166-AB (PA62DK)
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DESCRIPTION
The amplifier design is a dual power op amp on a single
monolithic die. The quad output PA62 combines two dual op
amp die in a single PSOP package. This approach provides
a cost-effective solution to applications where multiple ampli-
fiers are required or a bridge configuration is needed. Four
independent amplifiers coupled with low quiescent current and
very low THD makes this an ideal low-distortion 4-channel
audio amplifier for applications such as laptops and computer
speakers.
The quad output PA62DK is available in a surface mount
20-pin PSOP, JEDEC MO-166-AB package. The heat slug
of the DK package is tied to -Vs.
Built-in thermal shutdown allows the devices to self-protect
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TYPICAL APPLICATION
R1 and R2 set up Amplifier A as non-inverting. Amplifier
B is set up as a unity gain inverter driven from the output of
Amplifier A. Note that Amplifier B inverts the signals about
the reference node, which is set at mid-supply by R5 and
R6. When the command input is midrange, so is the output
of Amplifier A. Since this is also equivalent to the reference
node voltage, the output of Amplifier B is the same resulting
in 0V across the motor. Inputs more positive than 5V result in
motor current flow from left to right (see Figure 2). Inputs less
than 5V drive the motor in the opposite direction.
The amplifiers are especially well-suited for applications
such as this. The extended common mode range allows
command inputs as low as 0V. The output swing lets it drive
within 2V of the supply at an output of 1A. This means that
a command input that ranges from 0 to 10V will drive a 24V
motor from full scale CCW to full scale CW at ±1A.
FIGURE 3.
External Connections
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FIGURE 1.
Equivalent schematic (one channel)
APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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