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| CS3750 CS3750 Description DE SI GN 100mA Dual H-Bridge Air-Core Gauge Driver Features Absolute Maximum Ratings Supply Voltage.................................................................................................16V Internal Power Dissipation.....................................................Internally limited Logic Input Voltages .......................................................................-0.3V to 6.5V Junction Temperature Range ...................................................-40C to +150C Storage Temperature Range .....................................................-55C to +165C Lead Temperature Soldering Wave Solder (through hole styles only) ...........10 sec. max, 260C peak Electrostatic Discharge (Human Body Model)............................................4kV Block Diagram C1 RE CO MM EN DE D The controlling microprocessor sends out a PWM signal to each H bridge driver input (IN1, IN2). The PWM signal duty cycle is proportional to the H-bridge output. Output current AR CH IV FO E R N OUT1B OUT2A 1/2 H- Bridge Driver with Current Limit The CS3750 is a dual H-bridge four quadrant air-core gauge driver. The IC provides all the functions necessary to drive a tachometer or speedometer as part of a microprocessor based multiplexed system. Digital input control eliminates the need for any analog calibration of the gauge. The CS3750 is protected against 50V load dump, over voltage and thermal runaway fault conditions. Any of these faults causes the IC to shut down. Each high side of the output driver is current limited. A short circuit condition in one driver does not affect the others. EW (100mA max) direction is controlled by the DIRECTION input. PWM switching noise is minimized at each half bridge by an internal RC filter and external programmable capacitor. s 2 Independent NPN H-Bridge Drivers s No Analog Trim Required s Used in Multiplexed Systems s Quiet Gauge Operation s Programmable Slew Rate Minimizes Switching Noise s Fault Protection Over Voltage Thermal Shutdown Short Circuit Package Options 16 Lead PDIP (internally fused leads) OUT1A NO T OUT2B 1/2 H- Bridge Driver with Current Limit C2 DIR1 1 C1 IN1 Gnd Gnd OUT1A DIR2 C2 IN2 Gnd Gnd OUT2A VS2 OUT2B DE VI CE 1/2 H -Bridge Driver with Current Limit 1/2 H -Bridge Driver with Current Limit DIRECTION Control RC Filter for PWM Input DIRECTION Control RC Filter for PWM Input VS1 OUT1B Gnd Overvoltage Thermal Shutdown VREF VS1,2 DIR1 IN1 DIR2 IN2 ON Semiconductor 2000 South County Trail, East Greenwich, RI 02818 Tel: (401)885-3600 Fax: (401)885-5786 N. American Technical Support: 800-282-9855 Web Site: www.cherry-semi.com December, 2001 - Rev. 4 1 CS3750 Electrical Characteristics: 7.5V VCC 15V; -40C TA +85C; unless otherwise specified. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT s Output Stage VOUT Saturation Voltage (Low Side) VOUT Offset Voltage VOUT Saturation High Side Low Side VOUT Differential Matching Voltage Supply Current s Input Stage VIN LOW HIGH Hysteresis IIN LOW HIGH Output Slew Rate with respect to input Output Turn on Delay with respect to input Output Turn off Delay with respect to input s Direction VDIR LOW HIGH Hysteresis IDIR LOW HIGH Output Slew Rate with respect to DIR Output Fall Time with respect to DIR Output Turn on Delay with respect to DIR Output Turn off Delay with respect to DIR s Protection Functions IOUT Current Limit (High Side Only) Over Voltage Threshold Hysteresis Thermal Shutdown Hysteresis IOUT = 100mA; VIN = 0V IOUT = 1mA; VIN = 0V VC = 5V; IOUT = -30mA VIN = 5V;IOUT = -100mA VIN = 0V;IOUT = -1mA VC = 5V, IOUT = -100mA VIN = VDIR = 0; 0.25 0.01 VS-2 15 VS-1.5 0.02 0.50 0.10 50 VS 0.10 100 45 V V mV V V mV mA 23 VIN decreasing; VDIR = 0V VIN increasing; VDIR = 0V VDIR = 0V VIN = 0.8V; VDIR = 0V VIN = 3.5V VIN = 250Hz; RLOAD = 150 VIN = 250Hz; RLOAD = 150, note 1 VIN = 250Hz; RLOAD = 150, note 2 0.8 1.9 2.0 100 20 0.4 0.2 1.5 2.4 3.5 100 100.0 0.8 6 9 V V mV A A V/us s s VIN = 5V; VDIR decreasing VIN = 5V; VDIR increasing VIN = 5V VIN = 0V; VDIR = 0.8V VIN = 0V; VDIR = 3.5V VIN = 5V; fDIR = 250Hz; C = 0F VIN = 0V; VDIR = 0V; C = 0F VIN = 5V; RLOAD = 150 VDIR = 250Hz; C = 0F, note 1 VIN = 5V; RLOAD = 150 VDIR = 250Hz; C = 0F, note 2 0.8 0.2 1.9 2.0 100 40 0.4 1.5 0.2 3.5 100 100 V V mV A A V/s s 2.0 1 2.5 6 9 s s VIN = 5V VIN = 5V 100 17.0 225 21.5 0.5 160 20 26.0 mA V V C C Note 1: Time required for output signal to rise to 90% of its amplitude after input signal switches. Note 2: Time required for output signal to decrease to 10% of its amplitude after input signal switches. 2 CS3750 Package Pin Description PACKAGE PIN # PIN SYMBOL FUNCTION 16L PDIP (internally fused leads) 1 2 3 4,5,12,13 6 7 8 9 10 11 14 15 16 DIR1 C1 IN1 Gnd OUT1A VS1 OUT1B OUT2B VS2 OUT2A IN2 C2 DIR2 CMOS compatible input pin controls direction of current through OUT1 RC filter capacitor for OUT1 connected to Ground CMOS compatible input pin controls output OUT1A and 1B Ground connection One half of H-bridge output stage 1 Supply voltage One half of H-bridge output stage 1 One half of H-bridge output stage 2 Supply voltage One half of H-bridge output stage 2 CMOS compatible input pin controls output OUT2A and 2B RC filter capacitor for OUT2 connected to Ground CMOS compatible input pin controls direction of current through OUT2 Circuit Description Output Stage Each output stage contains 4 power NPN transistors arranged in a traditional H bridge configuration. Current flow through the two outputs (OUTxA, OUTxB) in each H-bridge is controlled by the logic signal DIRx. PWM input signals from the microprocessor, are filtered on chip and sent to the output stage. The duty cycle of the PWM signal is proportional to output voltage. The RC filter reduces the noise of the PWM input signal by slowing its slew rate: i.e., the output signal is converted from a square wave to an exponential sawtooth waveform. An external capacitor (Cx) controls the slew rate for each H bridge. Motor Direction Control When the voltage on the control pin (INx) is low, both halves of the H bridge are off (Table 1). When INx is high, DIR controls the flow of current through the H-bridge. If DIRx=0, current flows from OUTxA out to the coil and back in through OUTxB. If DIRx=1, current flows from OUTxB out to the coil and back in through OUTxA. Table 1. Logic Control of H-Bridge Protection The high side driver transistor in each H-bridge is current limited as a protection against a short circuit fault condition. If an over voltage or a thermal runaway fault conditions occurs, all outputs shut down. Application Diagram VBAT Microprocessor I/O 1 DIR1 DIR2 *C1 CS3750 C1 IN1 Gnd Gnd C2 IN2 Gnd Gnd *C2 OUT1A VS1 OUT1B OUT2A VS2 OUT2B Input INX 0 1 1 Direction DIRX X 0 1 0 1 0 Outputs OUTxA OUTxB 0 0 1 * 0.047F COIL1 COIL2 Circular Speedometer Air Core Gauge 3 CS3750 Package Specification PACKAGE DIMENSIONS IN mm (INCHES) PACKAGE THERMAL DATA D Lead Count 16L PDIP (internally fused leads) Metric Max Min 19.69 18.67 English Max Min .775 .735 Thermal Data RJC RJA typ typ 16L PDIP (internally fused leads) 15 50 C/W C/W Plastic DIP (N); 300 mil wide 3.68 (.145) 2.92 (.115) .356 (.014) .203 (.008) RE CO MM EN DE D AR CH IV FO E R N 8.26 (.325) 7.62 (.300) 1.77 (.070) 1.14 (.045) 0.39 (.015) MIN. .558 (.022) .356 (.014) D 2.54 (.100) BSC REF: JEDEC MS-001 DE VI CE NO T Ordering Information Part Number CS3750ENF16 Description 16L PDIP (internally fused leads) 4 ON Semiconductor and the ON Logo are trademarks of Semiconductor Components Industries, LLC (SCILLC). ON Semiconductor reserves the right to make changes without further notice to any products herein. For additional information and the latest available information, please contact your local ON Semiconductor representative. (c) Semiconductor Components Industries, LLC, 2000 EW Some 8 and 16 lead packages may have 1/2 lead at the end of the package. All specs are the same. 7.11 (.280) 6.10 (.240) DE SI GN |
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