SA160AEE

SA160 • SA160A H-Bridge Motor Driver/Amplifiers RoHS COMPLIANT FEATURES • • • • • • • • • Low Cost Complete H-Bridge Self-Contained Smart Lowside/Highside Drive Circuitry Wide Supply Range: up to 80V 10A Continuous Output 14A Continuous Output for A-Grade Isolated Case Allows Direct Heatsinking Four Quadrant Operation, Torque Control Capability Internal/Programmable PWM Frequency Generation Class D Switchmode Amplifier APPLICATIONS • • • • • Brush Type Motor Control Reactive Loads Magnetic Coils (MRI) Active Magnetic Bearing Vibration Canceling DESCRIPTION The SA160 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. www.apexanalog.com © Apex Microtechnology Inc. All rights reserved Jun 2022 SA160U Rev D SA160 • SA160A TYPICAL CONNECTION Figure 1: Typical Connection VCC VS 100nF VCC 1μF 100μF VS ANLG IN SA160 OUT A ϭɏ PWM IN OUT B DISABLE LOAD 100pF ISENSE B ISENSE A AGND PGND RSENSE A RSENSE B 2 SA160U Rev D SA160 • SA160A PINOUT AND DESCRIPTION TABLE Figure 2: External Connections Pin Number Name 1 AGND 2 PWM IN 3 DISABLE 4 ANLG IN 5 NC 6 PGND 7 Vcc 8 ISENSE A 9 10 11 OUT A Vs OUT B 12 ISENSE B SA160U Rev D Description Analog ground and reference for the internal PWM oscillator. Connect to pin 6 with a single conductor. TTL compatible PWM input. A duty cycle greater than 50% will produce greater than 50% duty cycle pulses on OUT A. A duty cycle less than 50% will produce greater than 50% duty cycle on OUT B. For analog inputs, the integration capacitor for the internal clock must be connected between this pin and AGND. Logic high at this pin will disable all outputs. If left open, an internal pullup to Vcc will keep DISABLE high. When taken low, all outputs function normally. Analog input. A voltage higher than Vcc/2 will produce greater than 50% duty cycle pulses on OUT B. A voltage lower than Vcc/2 will produce greater than 50% duty cycle pulses on OUT A. If using in the digital mode, bias this point at 1/2 the logic high level. No connection. Power ground. Connect Vs power supply ground, filters, and bypass capacitors. Connect to pin 1 with a single conductor. Voltage supply for logic circuit. Connect 12 V supply. The ground terminal of the supply must be connected to AGND. Connect RSENSE A between ISENSE A and PGND to monitor the current. All current from half-bridge A flows out of this pin from the load. The “A” terminal of the output. Connect this pin to one end of the load, opposite B. The supply rail. The “B” terminal of the output. Connect this pin to one end of the load, opposite A. Connect RSENSE B between ISENSE B and PGND to monitor the current. All current from half-bridge B flows out of this pin from the load. 3 SA160 • SA160A 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 & 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: 7 1.44  10 C F  pF  =  ------------------------- – 50  Fsw  4 SA160U Rev D SA160 • SA160A SPECIFICATIONS All Min/Max characteristics and specifications are guaranteed over the Specified Operating Conditions. Typical performance characteristics and specifications are derived from measurements taken at typical supply voltages and TC = 25°C, VCC = 12VDC ABSOLUTE MAXIMUM RATINGS Parameter Symbol Min Max Units Supply Voltage 1 Vs 80 V Output Current, continuous IO 15 A Output Current, peak, t=100 msec, Tcmax=85°C IO 21 A 16 V 156 W 260 °C 150 °C -55 +125 °C -40 +125 °C Logic Supply Voltage PD 2 Power Dissipation, internal Temperature, pin solder, 10s max. Temperature, junction Temperature Range, storage TJ Operating Temperature Range, case TC 3 1. Derate to 70V below TC = +25°C. 2. Each of the two active output transistors can dissipate 78W. 3. Long term operation at the maximum junction temperature will result in reduced product life. Derate power dissipation to achieve high MTTF. CAUTION The SA160 is constructed from MOSFET transistors. ESD handling procedures must be observed. The substrate contains beryllia (BeO). Do not crush, machine, or subject to temperatures in excess of 850°C to avoid generating toxic fumes. INPUT Parameter Analog Input Voltages Test Conditions SA160 Min Typ SA160A Max Min Typ Max Units VCC = 12V A,B Out = 50% Duty Cycle 1/2 VCC * V A Out = 100% Duty Cycle High 1/3 VCC * V B Out = 100% Duty Cycle High 2/3 VCC * V PWM Input PWM Pulse Low Voltage PWM Pulse High Voltage PWM Frequency Disable On 2.7 0.8 5.0 250 VCC Disable Off 0 0.8 SA160U Rev D 0 2.7 45 * * * * * V V kHz * * V * * V * 5 SA160 • SA160A OUTPUT Test Conditions Parameter SA160 Min Total VDS (ON) Voltage, both MOS- IDS = 10A FETs Tc = 85°C Total RON, both MOSFETs Efficiency, 10A Output Current, continuous Current, peak Switching Frequency IDS = 10A Tc = 85°C VS = 80V Tcmax=85°C for A-Grade t = 100 msec, Tcmax=85°C for A-Grade CF = 270pF SA160A Typ Max 1.4 0.14 Min Units Typ Max 2.5 * * V 0.25 * * Ω 97 * % 10 14 A 15 20 A Dead Time 45 * kHz 90 * ns SA160 SA160A POWER SUPPLY Test Conditions Parameter VS Voltage 1 Min Typ VS Current = Load Current VCC Voltage Max Min Typ 80 9.5 12 15 36 * Max Units * V * * V * * mA VCC Current, Quiescent Fsw=50 kHz 28 VS Current, Quiescent Fsw=50 kHz, no load, VS = 50V 6.5 * SA160 SA160A mA 1. Derate to 70V below TC = +25°C. THERMAL Parameter 1 Resistance, junction to case Resistance, junction to air Temperature Range, case Test Conditions Min Full temp range, for each transistor Full temp range Typ Max 1.4 1.6 Min 30 -40 Max * * °C/W +125 °C/W °C * +85 * Units Typ 1. Each of the two active output transistors can dissipate 78W. 6 SA160U Rev D SA160 • SA160A TYPICAL PERFORMANCE GRAPHS Figure 3: Power Derating Figure 4: Total Voltage Drop 2 1.8 60 40 SA160A 20 1.4 27°C 1.2 1 0.8 -40°C 0.6 0.4 Each Output Transistor 0.2 SA160 0 0 25 50 75 100 0 0 125 Case Temperature, TC (°C) 2 4 6 8 10 12 14 16 Output Current (A) Figure 5: Total RON, both MOSFETS Figure 6: PWM Frequency vs. Ext Int Cap 0.18 ϭϬϬϬ 0.14 0.12 27°C 0.1 -40°C 0.08 0.06 0 2 4 6 8 10 12 Output Current (A) SA160U Rev D 14 16 ůŽĐŬ&ƌĞƋƵĞŶĐLJ͕&Ɛǁ;Ŭ,njͿ 125°C 0.16 RON, (ё) 125°C 1.6 Voltage Drop (V) /ŶƚĞƌŶĂůWŽǁĞƌŝƐƐŝƉĂƟŽŶ͕;tͿ 80 Ĩ;Ɖ&Ϳс;ϭ͘ϰϰϳͬ&ƐǁͿʹϱϬ ϭϬϬ ϭϬ ϭϬ ϭϬϬ ϭϬϬϬ džƚĞƌŶĂů/ŶƚĞŐƌĂƟŽŶĂƉ͕;Ɖ&Ϳ 7 SA160 • SA160A Figure 7: IQVs vs. VS Voltage Figure 8: IQVs vs. Switching Frequency 80 Fsw = 50 kHz 50% Duty Cycle No Load 30 70 Tc = 125°C 25 20 15 Tc = 25°C 10 Tc = -40°C 5 0 10 20 40 30 50 60 70 VS Quiescent Current, (mA) VS Quiescent Current, (mA) 35 Vs = 45V, Cf = open PWM IN = 0V~5V SquireWavw No Load 60 Tc = 125°C 50 40 Tc = 25°C 30 20 Tc = -40°C 10 0 0 80 50 100 150 200 250 Switching Frequency, Fsw (kHz) VS, (V) Figure 9: IQVcc vs. VCC Voltage Figure 10: IQVcc vs. Switching Frequency 40 60 Vs = 45V No Load 36 VCC Quiescent Current, (mA) VCC Quiescent Current, (mA) 38 34 32 30 28 26 24 50 40 30 20 Vs=45V, Cf=open PWM IN=0V~5V SquireWavw No Load, Full Temp Range 10 22 20 9 10 11 12 13 VCC Voltage, (V) 8 14 15 0 0 50 100 150 200 250 Switching Frequency, Fsw (kHz) SA160U Rev D SA160 • SA160A Figure 11: IQVcc vs. Case Temperature Figure 12: Reverse Diode 30 10.0 26 Flyback Current, ISD (A) VCC Quiescent Current, (mA) 28 24 22 20 18 16 Vs = 45V FSW = 50kF 14 1.0 12 10 -40 -20 0 20 40 60 80 100 120 140 0.1 0.7 0.8 0.9 1 1.1 1.2 Source to Drain Diode Voltage (V) Case Temperature, TC (°C) Figure 13: Duty Cycle vs. Analog Input 100 Duty Cycle (%) 80 A OUT B OUT 60 40 20 0 1/6 1/3 1/2 2/3 5/6 ŶĂůŽŐ/ŶƉƵƚĂƐWƌŽƉŽƌƟŽŶŽĨsCC SA160U Rev D 9 SA160 • SA160A GENERAL Please read Application Note 30 “PWM Basics.” Refer to Application Note 1 “General Operating Considerations” which covers stability, supplies, heat sinking, mounting, current limit, SOA interpretation, and specification interpretation. Visit www.apexanalog.com for Apex Microtechnology’s complete Application Notes library, Technical Seminar Workbook, and Evaluation Kits. TYPICAL APPLICATION 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. Figure 14: Typical Application 11 9 4 3 2 SA160 LOAD 8 12 The SA160 also can be controlled through a micro-controller, See Figure 15. Figure 15: Typical Application 10 SA160U Rev D SA160 • SA160A PWM OSCILLATOR – INTERNAL OR EXTERNAL The SA160 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 SA160 with an external TTL pulse generator up to 250kHz. 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 1µF ceramic capacitor in parallel with another low ESR capacitor of at least 10µF per amp of output current. Capacitor types rated for switching applications are the only types that should be considered. The 1µF 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 0.1µF to 0.47µF ceramic capacitor connected directly to the Vcc and ANALOG GND pins will suffice. PCB LAYOUT The designer needs to appreciate that the SA160 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 SA160: 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 multi-layer 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. When A OUT is high and B OUT is low, the load current flows from A OUT to B OUT and out of the I SENSE B pin. When B OUT is high and A OUT is low, the load current flows from B OUT to A OUT and out of the I Jun 2022Jun 2022SENSE A pin. The SA160 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 typical connection diagram on page 2. This network assures proper operation under various loads. Minimal power is dissipated in the resistor. SA160U Rev D 11 SA160 • SA160A PACKAGE OPTIONS Part Number Apex Package Style Description SA160AEE SA160DP SA160DPA SA160EE EE 12-pin SIP w/ formed leads 12-pin SIP 12-pin SIP 12-pin SIP w/ formed leads DP DP EE PACKAGE STYLE EE 12 SA160U Rev D SA160 • SA160A PACKAGE STYLE DP SA160U Rev D 13 SA160 • SA160A NEED TECHNICAL HELP? CONTACT APEX SUPPORT! For all Apex Microtechnology product questions and inquiries, call toll free 800-546-2739 in North America. For inquiries via email, please contact apex.support@apexanalog.com. International customers can also request support by contacting their local Apex Microtechnology Sales Representative. To find the one nearest to you, go to www.apexanalog.com IMPORTANT NOTICE Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right to make changes without further notice to any specifications or products mentioned herein to improve reliability. This document is the property of Apex Microtechnology and by furnishing this information, Apex Microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. Apex Microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the information only for use within your organization with respect to Apex Microtechnology integrated circuits or other products of Apex Microtechnology. This consent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale. APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDERSTOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK. Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnology, Inc. All other corporate names noted herein may be trademarks of their respective holders. 14 SA160U Rev D