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FEATURES
* LOW COST COMPLETE H-BRIDGE * SELF-CONTAINED SMART LOWSIDE/HIGHSIDE DRIVE CIRCUITRY * WIDE SUPPLY RANGE: UP TO 80V * 10A CONTINUOUS OUTPUT * ISOLATED CASE ALLOWS DIRECT HEATSINKING * FOUR QUADRANT OPERATION, TORQUE CONTROL CAPABILITY * INTERNAL/PROGRAMMABLE PWM FREQUENCY GENERATION
12-PIN POWER SIP PACKAGE STYLE DP
Formed Leads Available See package styles ED & EE
APPLICATIONS
* * * * * * BRUSH TYPE MOTOR CONTROL CLASS D SWITCHMODE AMPLIFIER REACTIVE LOADS MAGNETIC COILS (MRI) ACTIVE MAGNETIC BEARING VIBRATION CANCELLING
TYPICAL APPLICATION

DESCRIPTION
The SA60 is a pulse width modulation amplifier that can supply 10A continuous current to the load. The full bridge amplifier can be operated over a wide range of supply voltages. All of the drive/control circuitry for the lowside and highside switches are internal to the hybrid. The PWM circuitry is internal as well, leaving the user to only provide an analog signal for the motor speed/direction, or audio signal for switchmode audio amplification. The internal PWM frequency can be programmed by an external integrator capacitor. Alternatively, the user may provide an external TTL-compatible PWM signal for simultaneous amplitude and direction control for four quadrant mode.
BLOCK DIAGRAM

A wide variety of loads can be driven in either the voltage mode or the current mode. The most common applications use three external blocks: a low pass filter converting pulse width data to an analog output, a difference amplifier to monitor voltage or current and an error amplifier. Filter inductors must be suitable for square waves at the switching frequency (laminated steel is generally not acceptable). Filter capacitors must be low ESR and rated for the expected ripple current. A difference amplifier with gain of less than one translates the differential output voltage to a single feedback voltage. Dashed line connections and a higher gain difference amplifier would be used for current control. The error amplifier integrates the difference between the input and feedback voltages to close the loop.

EXTERNAL CONNECTIONS

APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
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ABSOLUTE MAXIMUM RATINGS SPECIFICATIONS
SA60
SUPPLY VOLTAGE, +VS OUTPUT CURRENT, peak LOGIC SUPPLY VOLTAGE, Vcc POWER DISSIPATION, internal TEMPERATURE, pin solder - 10s max. TEMPERATURE, junction3 TEMPERATURE RANGE, storage OPERATING TEMPERATURE RANGE, case 80V4 15A 16V 156W1 260C 150C -40 to +85C -25 to +85C
ABSOLUTE MAXIMUM RATINGS
SPECIFICATIONS
PARAMETER INPUT ANALOG INPUT VOLTAGES A, B OUT = 50% Duty Cycle A OUT = 100% Duty Cycle High B OUT = 100% Duty Cycle High PWM INPUT PWM PULSE LOW VOLTAGE PWM PULSE HIGH VOLTAGE PWM FREQUENCY DISABLE ON DISABLE OFF OUTPUT Vds (ON) VOLTAGE, each MOSFET TOTAL Ron, both MOSFETs EFFICIENCY, 10A OUTPUT CURRENT, continuous CURRENT, peak SWITCHING FREQUENCY DEAD TIME POWER SUPPLY +VS VOLTAGE4 Vcc VOLTAGE Vcc CURRENT +VS CURRENT THERMAL3 RESISTANCE, junction to case RESISTANCE, junction to air TEMPERATURE RANGE, case TEST CONDITIONS2 Vcc = 12V 1/2VCC 1/3VCC 2/3VCC 0 2.7 45 2.7 0 Ids = 10A +VS = 80V t = 100 msec Cf = 270 pf 10 15 45 90 80 15 36 1.7 91 0.8 5.0 250 Vcc 0.8 2.5 .45 Vdc Vdc Vdc Vdc Vdc KHz Vdc Vdc Vdc % A A KHz nS Vdc Vdc mA mA C/W C/W C MIN TYP MAX UNITS
+VS Current = Load Current Vcc = 12Vdc Switching, no load, VS = 50V Full temp range, for each transistor Full temperature range
9.5
12 28 5
1.6 30 -25 +85
NOTES: 1. Each of the two active output transistors can dissipate 78W. 2. Unless otherwise noted: TC = 25C, Vcc = 12Vdc. 3. Long term operation at the maximum junction temperature will result in reduced product life. Derate internal power dissipation to achieve high MTTF. For guidance, refer to the heatsink data sheet. 4. Derate to 70V below TC = +25C.
CAUTION
The SA60 is constructed from MOSFET transistors. ESD handling procedures must be observed. The exposed substrate contains beryllia (BeO). Do not crush, machine, or subject to temperatures in excess of 850C to avoid generating toxic fumes.
APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH SHANNON ROAD * TUCSON, ARIZONA 85741 * USA * APPLICATIONS HOTLINE: 1 (800) 546-2739
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SA60

TYPICAL PERFORMANCE GRAPHS

APEX MICROTECHNOLOGY CORPORATION * TELEPHONE (520) 690-8600 * FAX (520) 888-3329 * ORDERS (520) 690-8601 * EMAIL prodlit@apexmicrotech.com
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OPERATING CONSIDERATIONS
SA60
BYPASSING
Adequate bypassing of the power supplies is required for proper operation. Failure to do so can cause erratic and low efficiency operation as well as excessive ringing at the outputs. The Vs supply should be bypassed with at least a 1F ceramic capacitor in parallel with another low ESR capacitor of at least 10F per amp of output current. Capacitor types rated for switching applications are the only types that should be considered. The 1F ceramic capacitor must be physically connected directly to the Vs and POWER GND pins. Even one inch of lead length will cause excessive ringing at the outputs. This is due to the very fast switching times and the inductance of the lead connection. The bypassing requirements of the Vcc supply are less stringent, but still necessary. A .1F to .47F ceramic capacitor connected directly to the Vcc and ANALOG GND pins will suffice.
GENERAL
Please read Application Note 30 on "PWM Basics". Refer to Application Note 1 "General Operating Considerations" for helpful information regarding power supplies, heat sinking and mounting. Visit www.apexmicrotech.com for design tools that help automate pwm filter design; heat sink selection; Apex's complete Application Notes library; Technical Seminar Workbook; and Evaluation Kits.
PWM OSCILLATOR - INTERNAL OR EXTERNAL
The SA60 contains an internal PWM oscillator whose frequency is determined by an external capacitor connected between pin 1 and pin 2. Maximum frequency is 125 kHz. The user may also disregard the internal PWM oscillator and supply the SA60 with an external TTL pulse generator up to 250KHZ.
PIN DESCRIPTION
VCC - is the low voltage supply for powering internal logic and drivers for the lowside and highside MOSFETS. The supplies for the highside drivers are derived from this voltage. VS - is the higher voltage H-bridge supply. The MOSFETS obtain the output current from this supply pin. The voltage on this pin is limited to +80V by the drive IC. The MOSFETS are rated at 100 volts. ISENSE A AND B - These are tied to power gnd directly or through sense resistors. ANALOG GND - is the reference for the internal PWM oscillator. Connect this pin to pin 6. Connect low side of Vcc supply and any other supply used to generate analog input signals to ANALOG GND. ANALOG INPUT - is an analog input for controlling the PWM pulse width of the bridge. A voltage higher than Vcc/2 will produce greater than 50% duty cycle pulses out of B OUT. A voltage lower than Vcc/2 will produce greater than 50% duty cycle pulses out of A OUT. If using in the digital mode, bias this point at 1/2 the logic high level. DISABLE - Is the connection for disabling all 4 output switches. DISABLE high overrides all other inputs. When taken low, everything functions normally. An internal pullup to Vcc will keep DISABLE high if pin left open. PWM INPUT - Is the TTL compatible digital input for controlling the PWM pulse width of the bridge. A duty cycle greater than 50% will produce greater than 50% duty cycle pulses out of the A out. A duty cycle less than 50% will produce greater than 50% duty cycle from the B out. For analog inputs, the integration capacitor for the internal clock must be connected between this pin and analog ground. The internal switching frequency is programmable up to 125 kHz by selection of the integration capacitor. The formula is:
PCB LAYOUT
The designer needs to appreciate that the SA60 combines in one circuit both high speed high power switching and low level analog signals. Certain layout rules of thumb must be considered when a circuit board layout is designed using the SA60: 1. Bypassing of the power supplies is critical. Capacitors must be connected directly to the power supply pins with very short lead lengths (well under 1 inch). Ceramic chip capacitors are best. 2. Connect ANALOG GND to POWER GND with a conductor having no intermediate connections. Connect all Vs power supply, filter and load related ground connections to POWER GND keeping these conductors separate until reaching pin 6. Connect all Vcc power supply and input signal related ground connections to ANALOG GND keeping conductors separate until reaching pin 1. Do not allow ground loops to form by making additional ground connections at the low side of the physical power supplies. If ground plane is used do not allow more than 1mA to flow through it. 3. Beware of capacitive coupling between output connections and signal inputs through the parasitic capacitance between layers in multilayer PCB designs. 4. Do not run small signal traces between the pins of the output section (pins 8-12).
CURRENT SENSE
There are two load current sensing pins, I SENSE A and I SENSE B. The two pins can be shorted to POWER GND in the voltage mode connection but both must be used in the current mode connection. It is recommended that R SENSE resistors be non-inductive. Load current flows in the I SENSE pins. The SA60 has no internal current limit.

TRANSIENT SUPPRESSION
An RC Network of A 100 PF Capacitor and a one ohm resistor is required as shown in the external connection diagram on page 1. This network assures proper operation under various loads. Minimal power is dissipated in the resistor.
This data sheet has been carefully checked and is believed to be reliable, SHANNON ROAD * is assumed ARIZONA 85741 * USA * APPLICATIONS are subject 1 (800) 546-2739 APEX MICROTECHNOLOGY CORPORATION * 5980 NORTH however, no responsibility TUCSON, for possible inaccuracies or omissions. All specificationsHOTLINE: to change without notice.
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SA60U REV J OCTOBER 2004 (c) 2004 Apex Microtechnology Corp.

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