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Technical content
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 V Peak output current I O PEAK tW ≤ 10μs 2.0 A Continuous output current I O max LVS pin 1.5 A Logic system supply voltage V CC max Independent IC 7.0 V Allowable power dissipation Pd max When mounted on a glass epoxy circuit board (reference value) : 114.3 mm76.1 mm1.6 mm 3.5 W Operating temperature Topr –20 to +85 C Storage temperature Tstg –55 to +150 C Package Dimensions unit : mm Monolithic Digital IC PWM Input Forward/Reverse Motor Driver 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. SIP14HZ 7.0 4.6 7.85.2 141 26.8 (20.0) 0.8 1.6 2.2 4.0 (8.4) (R1.7) 0.5 0.4(1.83) 1.78 HEAT SPREADER (11.8) 14.5MAX
No. 7390-2/6 LB11650 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 Recommended Operating Ranges at Ta = 25°C Parameter Symbol Conditions Ratings Unit min typ max [Output Block] Output stage supply current 1 IM ON With no load, ST = high 0.84 1.2 1.56 mA Output stage supply current 2 IM wt With no load, ST = low 50 µA Output saturation voltage 1 V O sat1 I O = +0.5 A, sink side 0.3 0.5 V Output saturation voltage 2 V O sat2 I O = +1.0 A, sink side 0.5 0.7 V Output saturation voltage 3 V O sat3 I O = –0.5 A, source side 1.5 1.8 V Output saturation voltage 4 V O sat4 I O = –1.0 A, source side 1.7 2.0 V Output leakage current IO leak VO = VM, sink side 50 µA VO = 0 V, source side –50 µA [Logic Block] VCC = 5 V, with the R pin open 50 68 85 mA ICC ON BRAKE: LOW, PWM: HI, ST: HI VCC = 3.3 V, with the R pin shorted to VCC 55 75 95 mALogic supply current BRAKE: LOW, PWM: HI, ST: HI ICC BR BRAKE: HI, PWM: HI, ST: HI 3.4 4.7 6.0 mA ICC OFF BRAKE: LOW, PWM: LOW, ST: HI 4.0 5.2 6.5 mA ICC wt ST: LOW 50 µA Input voltage VINH 2.0 V VINL 0.8 V Input current IINH V IN = 3.3 V 35 50 75 µA IINL V IN = 0.8 V 5 10 13 µA C pin charge current IC VC = 0 V 35 50 65 µA C pin output off threshold voltage Vtc 1.17 1.3 1.43 V VHS pin current detection VtVHS VM – 0.55 VM – 0.5 VM – 0.45 Vthreshold voltage VLS pin current detection VtVLS 0.45 0.5 0.55 Vthreshold voltage Low voltage cutoff voltage VLVSD 2.25 2.5 2.75 V Low voltage cutoff hysteresis VLVHYS 0.15 0.2 0.25 V Thermal shutdown temperature TTSD Design target value * 150 175 °C Electrical Characteristics at Ta = 25°C, VM = 24 V, VCC = 5 V *: This is a design target value and is not measured. Pd max — Ta 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 –20 0 20 40 60 80 85 100 Allowable power dissipation, Pdmax — W Ambient temperature, Ta — °C ILB01548 Specified circuit board: 114.3 · 76.1 · 1.6 mm Glass epoxy resin
No. 7390-3/6 LB11650 OA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Top view VLS VM VHS VCC ST C PWM PHASE BRAKE GND R DiGND OB LB11650 Truth Table X: H or L PHASE BRAKE ST PWM OA OB Operating mode H L H H H L Forward L L H H L H Reverse X L H L OFF OFF Output off X H H X H H Brake X X L or OPEN X OFF OFF Standby mode (circuits off) Pin Functions Pin No. Pin Pin function
1 OA Output
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
CC 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 Standby mode control. The IC operates in standby mode when this pin is low or open. 8 PWM PWM input. High: on Low: off 12 R Low side drive current switching. (Short R to VCC when VCC is 3.3 V, and leave R open when VCC = 5.0 V.)
11 GND Ground
13 DiGND Lower side regeneration diode ground connection
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 V CC 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. 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 V CC = 5 V: Leave the R pin open. When V CC = 3.3 V: Short the R pin to VCC . No. 7390-4/6 LB11650
No. 7390-5/6 LB11650 R Control logic circuit PWM PHASE ST BRAKE VM OA OB C GND VLS Thermal shutdown circuit UVLO VREF circuit Filter circuit VCC VHS Latch circuit DiGND M VCC = 5 V SW OPEN VCC = 3.3 V SW ON 7 2 14 1
PS No.7390-6/6 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 warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequentia l or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use a s components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and dis tributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personali n j u r yo r death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture oft h e part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.