SC8835

SC8835 Dual Low-Voltage H-Bridge IC Feature        General Description Dual H-Bridge Motor Driver - Capable of Driving Two DC Motors or One Stepper Motor - Low-MOSFET ON-Resistance: HS+LS 305 mΩ 1.5 A Maximum Drive Current Per H-Bridge Configure Bridges Parallel for 3 A Drive Current Separate Motor and Logic-Supply Pins - 0V to 11V Motor-Operating Supply-Voltage - 2V to 7V Logic Supply-Voltage Flexible PWM or PHASE/ENABLE Interface Low-Power Sleep Mode With 95nA Maximum Supply Current DFN 2mm x 3mm -12L Package The SC8835 provides an integrated motor driver solution for cameras, consumer products, toys, and other low-voltage or battery-powered motion control applications. The device has two H-bridge drivers, and drives two DC motors or one stepper motor, as well as other devices like solenoids. The output driver block for each consists of N-channel power MOSFETs configured as an H-bridge to drive the motor winding. An internal charge pump generates gate drive voltages. The SC8835 supplies up to 1.5A of output current per H-bridge and operates on a motor power supply voltage from 0V to 11V, and a device power supply voltage of 2V to 7V. PHASE/ENABLE and IN/IN interfaces are compatible Applications  Battery-Powered: - Cameras - DSLR Lenses - Consumer Products - Toys - Robotics - Medical Devices with industry-standard devices. Internal shutdown functions are provided for overcurrent protection, short circuit protection, under voltage lockout, and over temperature. The SC8835 is packaged in a 12-pin DFN package. Package The package of SC8835 is DFN 2*3 -12L. Information furnished by SteadiChips is believed to be accurate and reliable. However, no responsibility is assumed by SteadiChips for its use, or for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SteadiChips 1 Rev.1.2 ©2020~2021 SteadiChips Co., Ltd. SC8835 Dual Low-Voltage H-Bridge IC Absolute Maximum Ratings (If out of these ratings, the filter may be fail or damaged) Table 1 SYMBOL VM PARAMETER Motor power supply voltage MIN -0.3 MAX 12 VCC Power supply voltage -0.3 7 V TA Operating ambient Temperature Range -40 125 ℃ Storage Temperature -65 150 ℃ MIN MAX UNITS TSTG UNITS V Recommended Operating Conditions Table 2 SYMBOL PARAMETER VCC Device power supply voltage 2 7 V VM Motor power supply voltage 0 11 V VIN Logic level input voltage 0 VCC V IOUT H-bridge output current 0 1.5 A fPWM Externally applied PWM frequency 0 250 Operating ambient Temperature Range -40 TA kHz 85 ℃ Thermal Information Table 3 SYMBOL PARAMETER VALUE UNITS RJA Junction-to-ambient thermal resistance 65.3 ℃/W RJC Junction-to-thermal resistance 45.8 ℃/W 2 Rev.1.2 ©2020~2021 SteadiChips Co., Ltd. SC8835 Dual Low-Voltage H-Bridge IC Electrical Characteristics Specifications are at TA=+25℃, VM=5V, VCC=3V (unless otherwise noted) SYMBOL IVM IVMQ PARAMETER TEST CONDITIONS VM operating supply current VM sleep mode supply current IVCC VCC operating supply current VUVLO VCC undervoltage voltage VIL Input low voltage VIH Input high voltage IIL Input low current IIH Input high current RPD Pulldown resistance No PWM, no load MIN TYP 194 50 kHz PWM, no load 350 VM=2V, VCC=0V, all inputs 0V 5 VM=5V, VCC=0V, all inputs 0V 10 MAX lockout VCC rising 1.5 VCC falling 1.7 95 V 0.3 x VCC V V VIN=0 5 µA VIN=3.3V 50 µA 100 IOFF OFF-state leakage current IOCP Overcurrent protection trip level tDEG Overcurrent de-glitch time tOCR Overcurrent time tDEAD Output dead time tTSD Thermal shutdown temperature nA µA 0.5 x VCC HS+LS FET on resistance UNIT S µA 372 RDS(ON) protection SPEC KΩ VCC=3V, VM=3V, IO=800mA, TJ=25℃ 337 400 VCC=5V, VM=5V, IO=800mA, TJ=25℃ 300 360 1.6 retry 150 mΩ 200 nA 3.5 A 1 µs 1 ms 100 ns 160 180 ℃ 3 Rev.1.2 ©2020~2021 SteadiChips Co., Ltd. SC8835 Dual Low-Voltage H-Bridge IC Timing Requirements TA=+25℃, VM=5V, VCC=3V, RL=20Ω NO. MIN MAX UNIT 1 t1 Delay time, xPHASE high to xOUT1 low 300 ns 2 t2 Delay time, xPHASE high to xOUT2 high 200 ns 3 t3 Delay time, xPHASE low to xOUT1 high 200 ns 4 t4 Delay time, xPHASE low to xOUT2 low 300 ns 5 t5 Delay time, xENBL low to xOUTx high 200 ns 6 t6 Delay time, xENBL low to xOUTx low 300 ns 7 t7 Output enable time 300 ns 8 t8 Output disable time 300 ns 9 t9 Delay time, xINx high to xOUTx high 160 ns 10 t10 Delay time, xINx low to xOUTx low 160 ns 11 tR Output rise time 30 188 ns 12 tF Output fall time 30 188 ns 4 Rev.1.2 ©2020~2021 SteadiChips Co., Ltd. SC8835 Dual Low-Voltage H-Bridge IC PHASE/ENBL mode IN/IN mode Fig. 1 Timing Requirements 5 Rev.1.2 ©2020~2021 SteadiChips Co., Ltd. SC8835 Dual Low-Voltage H-Bridge IC PAD Definition Top View Fig 2. Pad definition of SC8835 Table 7. Pad definition No. Name I/O 1 VM POWER 2 AOUT1 O Bridge A output 1 3 AOUT2 O Bridge A output 2 4 BOUT1 O Bridge B output 1 5 BOUT2 O Bridge B output 2 6 GND GROUND 7 8 BIN2/BENBL BIN1/BPHASE 9 10 AIN2/AENBL AIN1/APHASE I I I I 11 MODE I 12 VCC POWER Description Motor supply EXTERNAL COMPONENTS OR CONNECTIONS Bypass to GND with 0.1µF (minimum) ceramic capacitor Connect to motor winding A Connect to motor winding B Device ground Bridge B input 2/ENABLE input IN/IN mode: Logic high sets BOUT2 high PH/EN mode: Logic high enables H-bridge B Internal pulldown resistor Bridge B input 1/PHASE input IN/IN mode: Logic high sets BOUT1 high PH/EN mode: Sets direction of H-bridge B Internal pulldown resistor Bridge A input 2/ENABLE input IN/IN mode: Logic high sets AOUT2 high PH/EN mode: Logic high enables H-bridge A Internal pulldown resistor Bridge A input 1/PHASE input IN/IN mode: Logic high sets AOUT1 high PH/EN mode: Sets direction of H-bridge A Internal pulldown resistor Input mode select Logic low selects IN/IN mode Logic high selects PH/EN mode Internal pulldown resistor Device supply Bypass to GND ceramic capacitor with 0.1µF(minimum) 6 Rev.1.2 ©2020~2021 SteadiChips Co., Ltd. SC8835 Dual Low-Voltage H-Bridge IC Feature Description The SC8835 is an integrated motor-driver solution used for brushed motor control. The device integrates two H-bridges, and drives two DC motor or one stepper motor. The output driver block for each H-bridge consists of N-channel power MOSFETs. An internal charge pump generates the gate drive voltages. Protection features include overcurrent protection, short circuit protection, undervoltage lockout, and overtemperature protection. The bridges connect in parallel for additional current capability. The SC8835 allows separation of the motor voltage and logic voltage if desired. If VM and VCC are less than 7 V, the two voltages can be connected. The mode pin allow selection of either a PHASE/ENABLE or IN/IN interface. Protection Circuits The SC8835 is fully protected against undervoltage, overcurrent, and overtemperature events. 1) Overcurrent Protection (OCP) An analog current limit circuit on each FET limits the current through the FET by removing the gate drive. If this analog current limit persists for longer than the OCP time, all FETs in the H-bridge disable. After approximately 1 ms, the bridge re-enable automatically. Overcurrent conditions on both high-side and low-side devices; a short to ground, supply, or across the motor winding result in an overcurrent shutdown. 2) Thermal Shutdown (TSD) If the die temperature exceeds safe limits, all FETs in the H-bridge disable. Operation automatically resumes once the die temperature falls to a safe level. 3) Undervoltage Lockout (UVLO) If at any time the voltage on the VCC pins falls below the undervoltage lockout threshold voltage, all circuitry in the device disable, and internal logic resets. Operation resumes when VCC rises above the UVLO threshold. Table 1. Device Protection FAULT CONDITION ERROR REPORT H-BRIDGE INTERNAL CIRCUITS RECOVERY VCC undervoltage (UVLO) VCC < VUVLO None Disabled Disabled VCC > VUVLO Overcurrent (OCP) IOUT > IOCP None Disabled Operating tOCR Thermal Shutdown (TSD) TJ > TTSD None Disabled Operating TJ < TTSD – THYS 7 Rev.1.2 ©2020~2021 SteadiChips Co., Ltd. SC8835 Dual Low-Voltage H-Bridge IC 1) Bridge Control Two control modes are available in the SC8835: IN/IN mode, and PHASE/ENABLE mode. IN/IN mode is selected if the MODE pin is driven low or left unconnected; PHASE/ENABLE mode is selected if the MODE pin is driven to logic high. Table 3 and Table 4 show the logic for these modes. Table 3. IN/IN Mode MODE xIN1 xIN2 xOUT1 xOUT2 0 0 0 Z Z FUNCTION (DC MOTOR) Coast 0 0 0 1 1 0 L H H L Reverse Forward 0 1 1 L L Brake Table 4. Phase/Enable Mode FUNCTION (DC MOTOR) Brake MODE xENABLE xPHASE xOUT1 xOUT2 1 0 X L L 1 1 1 L H Reverse 1 1 0 H L Forward 2) Sleep Mode If the VCC pin reaches 0 V, the SC8835 enters a low-power sleep mode. In this state all unnecessary internal circuitry powers down. For minimum supply current, all inputs should be low (0 V) during sleep mode. 8 Rev.1.2 ©2020~2021 SteadiChips Co., Ltd. SC8835 Dual Low-Voltage H-Bridge IC Application and Implementation Application Information The SC8835 is used in one or two motor control applications. Configure the SC8835 in parallel to provide double the current to one motor. The following design procedure can be used to configure the SC8835 in a brushed motor application. Typical Application The two H-bridges in the SC8835 drivers 1x Stepper motor or 2x DC motor. Figure 2 shows the connections. Fig.2 Drivers 1x Stepper motor or 2x DC motor 1 VM GND 6 Thermal Pad VCC 12 The two H-bridges in the SC8835 connect in parallel for double the current of a single H-bridge. Figure 6 shows the connections. Fig.3 Parallel Mode Connections 9 Rev.1.2 ©2020~2021 SteadiChips Co., Ltd. SC8835 Dual Low-Voltage H-Bridge IC Package DFN 2*3-12L Symbol Millimeters MIN NOM MAX A 0.70 0.75 0.80 A1 0 0.02 0.05 b 0.20 0.25 0.30 b1 0.18REF c 0.203REF D 2.90 3.00 3.10 D2 1.90 2.00 2.10 E 1.90 2.00 2.10 E2 0.80 0.90 1.00 E3 0.60 0.70 0.80 E4 0.10 0.20 0.30 e 0.50BSC Nd 2.50BSC L 0.25 0.30 0.35 R 0.05 0.10 0.15 K 0.25REF 10 Rev.1.2 ©2020~2021 SteadiChips Co., Ltd.