Ordering number : EN7390 LB11650 Monolithic Digital IC PWM Input Forward/Reverse Motor Driver http://onsemi.com Overview The LB11650 is a full bridge driver that supports switching between forward and reverse directions. It operates in one of four modes under application control: forward, reverse, brake, and open. It also supports direct PWM control from an external signal. The LB11650 is optimal for driving brush DC motors and bipolar stepping motors. Features Supports PWM input Built-in high and low side diodes Simultaneous on state prevention function (prevents through currents) Built-in thermal shutdown circuit (latching type) High and low side short circuit protection function (latching type overcurrent protection) Externally controllable modes: forward, reverse, brake, open Standby mode function Specifications Absolute Maximum Ratings at Ta = 25C Parameter Symbol Conditions Ratings unit Motor supply voltage VM max 30 Peak output current IO PEAK tW ≤ 10μs 2.0 V A Continuous output current IO max LVS pin 1.5 A Logic system supply voltage VCC max Pd max Independent IC When mounted on a glass epoxy circuit board (reference value) : 114.3 mm76.1 mm1.6 mm 7.0 V Allowable power dissipation 3.5 W Operating temperature Topr –20 to +85 C Storage temperature Tstg –55 to +150 C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Package Dimensions unit : mm 26.8 HEAT SPREADER (20.0) 4.0 7.8 14.5MAX 1 (1.83) 5.2 4.6 7.0 (11.8) (8.4) (R1.7) 14 1.78 0.5 0.8 0.4 1.6 2.2 SIP14HZ Semiconductor Components Industries, LLC, 2013 July, 2013 93003TN (OT) No.7390-1/6 LB11650 Recommended Operating Ranges at Ta = 25°C Parameter Symbol Conditions Ratings Unit Motor supply voltage VM 8 to 28 V Logic system supply voltage VCC 3.0 to 5.25 V Logic input voltage range VIN –0.3 to VCC V Electrical Characteristics at Ta = 25°C, VM = 24 V, VCC = 5 V Parameter Symbol Ratings Conditions min typ Unit max [Output Block] Output stage supply current 1 IM ON With no load, ST = high Output stage supply current 2 IM wt With no load, ST = low 0.84 1.2 1.56 mA 50 µA Output saturation voltage 1 VO sat1 IO = +0.5 A, sink side 0.3 0.5 V Output saturation voltage 2 VO sat2 IO = +1.0 A, sink side 0.5 0.7 V Output saturation voltage 3 VO sat3 IO = –0.5 A, source side 1.5 1.8 V Output saturation voltage 4 VO sat4 IO = –1.0 A, source side 1.7 2.0 V 50 µA Output leakage current IO leak VO = VM, sink side VO = 0 V, source side –50 µA [Logic Block] ICC ON Logic supply current ICC BR ICC OFF ICC wt Input voltage Input current VCC = 5 V, with the R pin open BRAKE: LOW, PWM: HI, ST: HI 50 68 85 mA VCC = 3.3 V, with the R pin shorted to VCC BRAKE: LOW, PWM: HI, ST: HI 55 75 95 mA BRAKE: HI, PWM: HI, ST: HI 3.4 4.7 6.0 mA BRAKE: LOW, PWM: LOW, ST: HI 4.0 5.2 6.5 mA 50 µA ST: LOW VINH 2.0 V VINL IINH VIN = 3.3 V IINL VIN = 0.8 V C pin charge current IC C pin output off threshold voltage Vtc VC = 0 V 0.8 V 35 50 75 µA 5 10 13 µA 35 50 65 µA 1.17 1.3 1.43 V VHS pin current detection threshold voltage VtVHS VM – 0.55 VM – 0.5 VM – 0.45 V VLS pin current detection threshold voltage VtVLS 0.45 0.5 0.55 V Low voltage cutoff voltage Low voltage cutoff hysteresis Thermal shutdown temperature VLVSD 2.25 2.5 2.75 V VLVHYS 0.15 0.2 0.25 V 150 175 TTSD Design target value* °C *: This is a design target value and is not measured. Pd max — Ta Allowable power dissipation, Pdmax — W 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 Specified circuit board: 114.3 × 76.1 × 1.6 mm Glass epoxy resin 0 –20 0 20 40 60 Ambient temperature, Ta — °C 80 85 100 ILB01548 No. 7390-2/6 LB11650 Pin Assignment 11 12 13 14 OB 10 DiGND C 9 R ST 8 GND 7 BRAKE 6 PHASE 5 PWM 4 VCC VLS 3 VHS 2 VM 1 OA LB11650 Top view Truth Table PHASE BRAKE ST PWM OA OB H L H H H L L L H H L H X L H L OFF OFF X H H X H H X X L or OPEN X OFF OFF Operating mode Forward Reverse Output off Brake Standby mode (circuits off) X: H or L Pin Functions Pin No. Pin 1 OA Output Pin function 14 OB Output 4 VHS High side current sensing (Insert an external resistor between VM and VHS. When the voltage across this resistor reaches 0.5 V, the outputs are turned off.) 2 VLS Low side current sensing (Insert an external resistor between VLS and ground. When the voltage across this resistor reaches 0.5 V, the outputs are turned off.) 7 C Connection for an external filter capacitor that prevents incorrect operation of the current sensing output shutdown and thermal shutdown circuits. 3 VM Motor system power supply 5 VCC Logic system power supply 9 PHASE Forward/reverse switching pin 10 BRAKE Brake control input. A high input switches the IC to brake mode. 6 ST 8 PWM 12 R 11 GND 13 DiGND Standby mode control. The IC operates in standby mode when this pin is low or open. PWM input. High: on Low: off Low side drive current switching. (Short R to VCC when VCC is 3.3 V, and leave R open when VCC = 5.0 V.) Ground Lower side regeneration diode ground connection No. 7390-3/6 LB11650 High/Low Short Protection Function This function turns the outputs off to prevent destruction of the IC if a problem such as an output pin being shorted to VM or ground occurs and excessive current flows in the output transistors. When an excessive current flows in an output transistor, a potential will occur across either the high side or the low side current sense resistor. If that value exceeds the current detection threshold voltage, the capacitor connected to the C pin starts to charge. Then, when the C pin voltage is charged to the output off threshold voltage, the output transistors are turned off. To restart the IC once it has gone to the output off state, either set the ST pin to the low level, or temporarily cut the VCC power supply, and then reapply power. The overcurrent detection current setting can be set to an arbitrary level with the resistor inserted between VM and VHS for current flowing in the high side output transistor, and with the resistor inserted between VLS and ground for current flowing in the low side output transistor. When the resistor connected to VHS or VLS pin is R (Ω), the detected current I (A) will be as follows. I (A) = 0.5 (V) / R (Ω) For example, if R is 0.5 Ω, the detected current I will be 1 A. This function is not an output current limiter function. The detection current described above has the meaning that the short-circuit protection circuit begins to operate when a current in excess of the detection current flows in the outputs. Therefore, if an output pin is shorted to VM or ground, the maximum possible overcurrent that the output transistors are capable of will flow until the mask time set with the filter circuit has elapsed. Designers must exert great care in designing the mask time setting. Filter Circuit To prevent the overcurrent protection and thermal shutdown circuits from operating incorrectly due to noise, the LB11650 includes a circuit that sets a mask time so that when an abnormality is detected, it only turns the outputs off if that state continues for a certain length of time. When the capacitor connected between the C pin and ground is C (pF), the mask time T (µs) will be as follows. T (µs) = 2.6 × 10–2 × C (pF) For example, if C is 50 pF, the mask time T will be 1.3 µs. Low Side Transistor Drive Current Switching Pin Since the lower side output transistor drive current is created from VCC, if the VCC power supply level is reduced, the drive current will also be reduced. Therefore, the LB11650 is provided with a pin for switching the drive current so that the LB11650 can provide the same drive current when used with 3.3 V specifications as it does when used with 5 V specifications. When VCC = 5 V: Leave the R pin open. When VCC = 3.3 V: Short the R pin to VCC. No. 7390-4/6 LB11650 Block Diagram M VM 3 OA 1 14 OB 4 VHS PWM 8 PHASE 9 BRAKE 10 ST Control logic circuit 6 R 12 13 DiGND VCC = 5 V SW OPEN VCC = 3.3 V SW ON Latch circuit VCC 5 Thermal shutdown circuit UVLO VREF circuit Filter circuit GND 11 C 7 2 VLS No. 7390-5/6 LB11650 ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. 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