APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

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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

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)

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

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

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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20-PIN PSOP

PACKAGE STYLE DK

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FIGURE 1. Equivalent schematic (one channel)