A3910 Dual Half Bridge Motor Driver Description Features and Benefits • Low RDS(on) outputs • Standby mode with zero current drain • Small 2 × 2 DFN package • Crossover Current protection • Thermal Shutdown protection The A3910 is a dual half bridge motor driver, designed for low cost, low voltage battery operated power applications. The outputs are rated for operation up to 500 mA. Direct control of high- and low-side drivers is implemented to allow either high-side or low-side PWM. The motor can be connected to either supply or GND. Using a MOS switch results in improved braking action for the motor, compared to implementation with simple clamp diode. The A3910 is supplied in a 2 mm × 2 mm 8-contact DFN package (EE) with exposed thermal pad. The package is lead (Pb) free, with 100% matte tin leadframe plating. Package: 8-contact DFN with Exposed Thermal Pad (suffix EE) Not to scale Typical Application Diagram VSUPPLY VSUPPLY System Controller A3910 (A) Connection to Supply A3910-DS, Rev. 1 System Controller A3910 M M M M (B) Connection to Ground A3910 Dual Half Bridge Motor Driver Selection Guide Part Number Packing* Package A3910EEETR-T 3000 pieces per 7-in. reel 8-contact DFN with exposed thermal pad *Contact Allegro™ for additional packing options. Absolute Maximum Ratings* Rating Unit Supply Voltage Characteristic Symbol VBB Notes –0.3 to 5.5 V Logic Input Voltage Range VIN –0.3 to 6 V Output Current IOUT 500 mA Output Voltage VOUT –0.3 to VBB + 1 V Operating Ambient Temperature TA –40 to 85 ºC Maximum Junction Temperature TJ(max) 150 ºC Tstg –55 to 150 ºC Storage Temperature E temperature range Thermal Characteristics may require derating at maximum conditions, see application information Characteristic Symbol Test Conditions* On 4-layer PCB based on JEDEC standard RθJA Package Thermal Resistance On 2-layer PCB based with 0.23 copper each side in.2 exposed Value Unit 49 ºC/W 92 ºC/W *Additional thermal information available on the Allegro website. Terminal List Table Pin-out Diagram HIN1 1 8 OUT1 LIN1 2 7 VBB 6 GND 5 OUT2 LIN2 3 HIN2 4 PAD Number Name Function 1 HIN1 Logic input 2 LIN1 Logic input 3 LIN2 Logic input 4 HIN2 Logic input 5 OUT2 Motor terminal 6 GND Ground 7 VBB Input Supply 8 OUT1 Motor terminal Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 2 A3910 Dual Half Bridge Motor Driver Functional Block Diagram VBB Gate Drive Supply HIN1 VIN = 3 V typ (Option: VBB or GND) VBB OUT1 LIN1 Sleep Mode Disable TSD TSD Disable GND VBB VBB Gate Drive HIN2 VBB OUT2 LIN2 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 3 A3910 Dual Half Bridge Motor Driver ELECTRICAL CHARACTERISTICS* Valid at TA = 25°C; unless otherwise specified Characteristic Symbol VBB Supply Range VBB VBB Supply Current IBB Output Driver On-Resistance Input Logic Low Level Input Logic High Level Input Hysteresis Logic Input Current RDS(on) Thermal Shutdown Hysteresis Min. Typ. Max. Unit 2.5 – 5.5 V Both bridges, PWM = 50 kHz – 0.3 1 mA Sleep mode (HIN1 = HIN2 = LIN1 = LIN2 = 0 V) – <1 1 μA Source driver, I = 400 mA, VBB = 3 V – 1.1 1.4 Ω Source driver, I = 400 mA, VBB = 5 V – 0.8 1 Ω Sink driver, I = 400 mA, VBB = 3 V – 0.5 0.65 Ω Sink driver, I = 400 mA, VBB = 5 V – 0.4 0.52 Ω VIL – – 0.5 V VIH VBB / 2 – – V VHYS 50 150 300 mV IIN Thermal Shutdown Temperature Test Conditions VIN = 3.3 V (Pulldown = 100 kΩ) – 33 50 μA TJTSD Temperature increasing – 165 – °C ΔTJ Recovery = TJTSD – ΔTJ – 15 – °C *Specified limits are tested at a single temperature and assured over operating temperature range by design and characterization. Logic Table HINx LINx OUTx Function Motor to Supply Function Motor to GND 0 0 Hi-Z1 Coast (Sleep2) Coast (Sleep2) 1 0 High Brake Drive 0 1 Low Drive Brake 1 1 Hi-Z1 Coast Coast 1Hi-Z is high impedance. 2Sleep mode activated by all four inputs <100 mV. Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 4 A3910 Dual Half Bridge Motor Driver Characteristic Performance Output On-Resistance versus Load Supply Voltage 1.8 1.6 RDS(on) (Ω) 1.4 1.2 Source = 500 mA 1.0 Source = 100 mA Sink = 500 mA 0.8 Sink = 100 mA 0.6 0.4 0.2 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 VBB (V) Output On-Resistance versus Output Current 1.8 1.6 RDS(on) (Ω) 1.4 1.2 Source = 3 V 1.0 Source = 5 V Sink =3 V 0.8 Sink = 5 V 0.6 0.4 0.2 0 100 200 300 400 500 I OUT (mA) Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 5 A3910 Dual Half Bridge Motor Driver Package EE, 8-Contact DFN with Exposed Thermal Pad 0.30 0.50 8 2.00 ±0.15 8 0.83 2.00 ±0.15 0.90 2.13 A 1 9X 2 D SEATING PLANE 0.08 C +0.05 0.55 –0.04 0.25 ±0.05 0.50 1 C 1.60 PCB Layout Reference View For reference only (DWG-2857), not for tooling use (reference JEDEC MO-229UCCD) Dimensions in millimeters Exact case and lead configuration at supplier discretion within limits shown 2 0.325 ±0.050 0.90 B 8 1 C 1.60 A Terminal #1 mark area B Exposed thermal pad (reference only, terminal #1 identifier appearance at supplier discretion) C Reference land pattern layout (reference IPC7351 SON50P200X200X100-9M); All pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary to meet application process requirements and PCB layout tolerances; when mounting on a multilayer PCB, thermal vias at the exposed thermal pad land can improve thermal dissipation (reference EIA/JEDEC Standard JESD51-5) D Coplanarity includes exposed thermal pad and terminals Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 6 A3910 Dual Half Bridge Motor Driver Revision History Revision Revision Date Rev. 1 July 23, 2013 Description of Revision Update Selection Guide Copyright ©2013, Allegro MicroSystems, LLC Allegro MicroSystems, LLC reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. For the latest version of this document, visit our website: www.allegromicro.com Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 7