TMI8870 TOLL | Alldatasheet

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TMI and SUNTO are the brands of TOLL microelectronic TMI8870_TMI8870B V1.0 2019. 06 www.toll-semi.comwww.suntosemi.com TMI8870 TMI8870B TMI8870/B 3.6-A Brushed DC Motor Driver

FEATURES

⚫ H-Bridge Motor Driver Drives One DC Motor, One Winding of a Stepper Motor, or Other Loads ⚫ Wide 6.8V to 45V Operating Voltage ⚫ 3.6-A Peak Current Drive ⚫ PWM Control Interface ⚫ Integrated Current Regulation ⚫ Low-Power Sleep Mode ⚫ VM Undervoltage Lockout (UVLO) ⚫ Overcurrent Protection (OCP) - Retry after OCP: TMI8870 - Latch after OCP: TMI8870B ⚫ Thermal Shutdown (TSD) ⚫ Automatic Fault Recovery ⚫ ESOP8 Small Package and Footprint

APPLICATIONS

⚫ Printers ⚫ Appliances ⚫ Industrial Equipment ⚫ Other Mechatronics Applications GENERAL DESCRIPTION The TMI8870/B device are the brushed-DC motor drivers for printers, appliances, industrial equipment, and other small machines. Two logic inputs control the H-bridge driver, which consists of four N -channel MOSFETs that can control motors bidirectionally with up to 3.6 -A peak current. The inputs can be pulse width modulated (PWM) to control motor speed, using a choice of current - decay modes. Setting both inputs slow enter a low- power sleep mode. The TMI8870/B devices feature integrated current regulation, based on the analog input VREF and the voltage on the ISEN pin, which is proportional to motor current through an external sense resistor. The ability to limit current to a known level can significantly reduce the system power requirements and bulk capacitance needed to maintain stable voltage, especially for motor startup and stall conditions. The device s are fully protected from faults and short circuits, including UVLO，OCP, and TSD. TYPICAL APPILCATION TMI8870 TMI8870B VM: 6.8V to 45V Controller IN1 VREF Brushed DC Motor Driver Current regulations Fault protection ISEN BDC IN2 Figure 1. Basic Application Circuit

TMI and SUNTO are the brands of TOLL microelectronic www.toll-semi.comwww.suntosemi.com TMI8870_TMI8870B V1.0 2019. 06 ABSOLUTE MAXIMUM RATINGS (Note 1) Parameter Value Unit Power supply voltage (VM) -0.3~45 V Logic input voltage (IN1, IN2) -0.3~6 V Reference input pin voltage (VREF) -0.3~6 V Continuous phase node pin voltage (OUT1, OUT2) -0.7~(VM+0.7) V Current sense input pin voltage (ISEN) -0.5~1 V Output current (100% duty cycle) 0~3.5 A Operating junction temperature (Note 2) -40~150 °C Storage temperature -65~150 °C PACKAGE/ORDER INFORMATION GND IN2 OUT1 OUT2 IN1 VM5VREF 4 ISEN7 Exposed Pad ESOP8 Top Mark: T8870/YYXXX (T8870: Device Code, YYXXX: Inside Code) T8870B/YYXXX (T8870B: Device Code, YYXXX: Inside Code) Part Number Package Top mark Quantity/ Reel TMI8870 ESOP8 T8870/YYXXX 3000 TMI8870B ESOP8 T8870B/YYXXX 3000 TMI8870 and TMI8870B devices are Pb-free and RoHS compliant.

TMI and SUNTO are the brands of TOLL microelectronic TMI8870_TMI8870B V1.0 2019. 06 www.toll-semi.comwww.suntosemi.com TMI8870 TMI8870B PIN FUNCTIONS Pin Name Function 1 GND Logic ground. Connect to board ground 2 IN2 Logic inputs. Controls the H-bridge output. Has internal pulldowns. 3 IN1 Logic inputs. Controls the H-bridge output. Has internal pulldowns. 4 VREF Analog input. Apply a voltage between 0.3V to 5V. 5 VM 6.8V to 45V power supply. Connect a 0.1μF bypass capacitor to ground, as well as sufficient bulk capacitance, rated for the VM voltage. 6 OUT1 H-bridge output. Connect directly to the motor or other inductive load.

7 ISEN

High-current ground path. If using current regulation, connect ISEN to a resistor (low- value, high-power-rating) to ground. If not using current regulation, connect ISEN directly to ground. 8 OUT2 H-bridge output. Connect directly to the motor or other inductive load. ESD RATING Items Description Value Unit VESD Human Body Model for all pins ±2000 V JEDEC specification JS-001 RECOMMENDED OPERATING CONDITIONS Items Description Min Max Unit VM Power supply voltage range 6.8 45 V TJ Operating Junction Temperature Range -40 125 °C

TMI and SUNTO are the brands of TOLL microelectronic www.toll-semi.comwww.suntosemi.com TMI8870_TMI8870B V1.0 2019. 06

ELECTRICAL CHARACTERISTICS

TA = 25° C, over recommended operating conditions unless otherwise noted.) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT POWER SUPPLY (VM) VM operating voltage VM 6.8 45 V VM operating supply current IVM VM = 12V 3 mA VM sleep current IVMSLEEP VM = 12V 1 µA Turn-on time (Note 3) tON VM > VUVLO with IN1 or IN2 high 30 µs LOGIC-LEVEL INPUTS (IN1, IN2) Input logic low voltage VIL 0.5 V Input logic high voltage VIH 1.6 V Input logic hysteresis VHYS 0.5 V Input logic low current IIL VIN = 0V –1 1 μA Input logic high current IIH VIN = 3.3V 62 μA Pulldown resistance RPD to GND 53 kΩ Propagation delay tPD INx to OUTx change 0.7 μs Time to sleep tsleep Inputs low to sleep 1 ms MOTOR DRIVER OUTPUTS (OUT1, OUT2) High-side FET on resistance RDS(ON)_High VM = 24 V, IOUT = 1A, 430 mΩ Low-side FET on resistance RDS(ON)_Low VM = 24 V, IOUT = 1A, 480 mΩ Output dead time tDEAD 220 ns Body diode forward voltage Vd IOUT = 1A 0.9 V CURRENT REGULATION ISEN gain AV VREF = 2.5V 10 V/V PWM off-time tOFF 25 µs PWM blanking time tBLANK 2 µs PROTECTION CIRCUITS VM undervoltage lockout VUVLO_fall VM falls until UVLO triggers 6.2 V VUVLO_rise VM rises until operation recovers 6.5 V VM undervoltage hysteresis VUV_HYS Rising to falling threshold 240 mV Overcurrent protection trip level IOCP 4.5 A Overcurrent deglitch time tOCP 1.8 μs Overcurrent retry time tRETRY 3 ms

Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. temperature is calculated by PD (MAX) = (TJ(MAX)-TA)/θJA. Note 3: tON applies when the device initially powers up, and when it exits sleep mode. Note 4: Thermal shutdown threshold and hysteresis are guaranteed by design. to 3.6-A peak current. The integrated current regulation restricts motor current to a predefined maximum. outputs are controlled by the two logic inputs IN1 and IN2 as listed in Table 1. Table 1. H-Bridge Control = 0) for fast current decay is also available. The input pins can be powered before VM is applied.

TMI and SUNTO are the brands of TOLL microelectronic www.toll-semi.comwww.suntosemi.com TMI8870_TMI8870B V1.0 2019. 06 Sleep Mode When the IN1 and IN2 pins are both low for time tSLEEP (typically 1 ms), the TMI8870/B device enters a low- power sleep mode, where the outputs remain High -Z and the device uses I VMSLEEP (µA) of current. If the device is powered up while both inputs are low, it immediately enters sleep mode. After the IN1 or IN2 pins are high for at least 5 µs, the device is operational 30 µs (tON) later. Current Regulation In TMI8870/B, motor peak current can be limited by the analog reference input VREF and the resistance of external sense resistor on the ISEN pin according to the below equation: ITRIP (A)= VREF (V) AV × RISEN(Ω) = VREF (V) 10 × RISEN(Ω) VM Undervoltage Lockout (UVLO) If at any time the voltage on the VM pin falls below the undervoltage-lockout threshold voltage, all FETs in the H-bridge will be disabled. Operation resumes when VM rises above the UVLO threshold. Overcurrent Protection (OCP) If the output current exceeds the OCP threshold, IOCP, for longer than t OCP, all FETs in the H -bridge are disabled. As to TMI8870, after a duration of tRETRY, the H-bridge is re-enabled according to the state of the INx pins. If the overcurrent fault is still present, the cycle repeats; otherwise normal device operation resumes. As to TMI8870B, after OCP events, the device is latched and it can only b e reset by putting the device into sleep mode or by restarting the power of VM. Thermal Shutdown (TSD) If the die temperature exceeds safe limits, all FETs in the H -bridge are disabled. After the die temperature has fallen to a safe level, operation automatically resumes. Device Functional Modes The TMI8870/B devices can be used in multiple ways to drive a brushed DC motor. PWM With Current Regulation This scheme uses all of the capabilities of the device. The I TRIP current is set above the normal operating current, and high enough to achieve an adequate spin -up time, but low enough to constrain current to a desired level. Motor speed is controlled by the duty cycle of one of the inputs, while the other input is static. Brake or slow decay is typically used during the off-time.

TMI and SUNTO are the brands of TOLL microelectronic TMI8870_TMI8870B V1.0 2019. 06 www.toll-semi.comwww.suntosemi.com TMI8870 TMI8870B PWM Without Current Regulation If current regulation is not required, the ISEN pin should be directly connected to the PCB ground plane. The VREF voltage must still be 0.3V to 5 V, and larger voltages provide greater noise margin. This mode provides the highest-possible peak current which is up to 3.6 A for a few hundred milliseconds (depending on PCB characteristics and the ambient temperature). If current exceeds 3.6 A, the device might reach overcurrent protection (OCP) or overtemperature shutdown (TSD). If that happens, the device disables and protects itself for about 3ms (tRETRY) and then resumes normal operation. Static Inputs with Current Regulation The IN1 and IN2 pins can be set high and low for 100% duty cycle drive, and ITRIP can be used to control the current of the motor, speed, and torque capability. VM Control In some systems, varying VM as a means of changing motor speed is desirable. In application, local bulk capacitance is n eeded on VM to GND to stable VM voltage during the operati on with motor starts up or stops. At least a 47μF bulk capacitor with voltage rating of operation voltage is recomm ended. However, the system-level testing is required to determine the appropriate size bulk capacitors.

APPLICATION INFORMATION

The TMI8870/B devices are typically used to drive one brushed DC motor as below: IN2 GND IN1 VREF VM OUT1 ISEN OUT2 TMI8870 TMI8870B Controller BDC VM: 6.5V-45V3.3V 0.2Ω 0.1μF 47μF

Figure 2. TMI8870/B Block Diagram

TMI and SUNTO are the brands of TOLL microelectronic TMI8870_TMI8870B V1.0 2019. 06 www.toll-semi.comwww.suntosemi.com TMI8870 TMI8870B

PACKAGE INFORMATION

Unit: mm Symbol Dimensions In Millimeters Symbol Dimensions In Millimeters Min Max Min Max A 4.70 5.10 C 1.35 1.75 B 3.70 4.10 a 0.35 0.49 L 6.00 6.40 R 0.30 0.60 E 1.27 BSC P 0° 7° K 0.02 0.10 b 0.40 1.25 A1 3.1 3.5 B1 2.2 2.6 Note: 1) All dimensions are in millimeters. 2) Package length does not include mold flash, protrusion or gate burr. 3) Package width does not include inter lead flash or protrusion. 4) Lead popularity (bottom of leads after forming) shall be 0.10 millimeters max. 5) Pin 1 is lower left pin when reading top mark from left to right.

TMI and SUNTO are the brands of TOLL microelectronic www.toll-semi.comwww.suntosemi.com TMI8870_TMI8870B V1.0 2019. 06 TAPE AND REEL INFORMATION TAPE DIMENSIONS: ESOP8 REEL DIMENSIONS: ESOP8 Unit: mm A B C D E F T1 Note: 1) All Dimensions are in Millimeter 2) Quantity of Units per Reel is 3000 3) MSL level is level 3.