NJU7385. Dual H-bridge Driver for actuator

Transcription

1 Dual H-bridge Driver for actuator GENERAL DESCRIPTION The NJU7385 is a dual H-bridge driver IC that has general versatility for a compact actuator. The Mode Select Function in the control part can select two types of control systems, Two-input and Phase & Enable. Input part has a Schmitt inverter circuit with a high resistance to noise. And it has a transition sequence which automatically transits to standby mode with no input signal. Output part has two circuit configurations of independent H-bridge. Protection circuit contains an under voltage lockout (UVLO) circuit and a thermal shutdown circuit and s alarm signal if an error is detected. Supply /interface voltage corresponds to the logic, 3.3V/5.0V. The NJU7385 is superior to performance compared to conventional products. It has the low current consumption and improved standby function (Auto/Manual). Especially, it is suitable for battery equipment. And it has versatility and a wide range of applications for various actuators, such as a compact step motor, DC motor, and solenoid. PACKAGE OUTLINE NJU7385VC3 Supply Voltage V DD =2.5 to 5.5V =3.0 to 8.0V Output Current Io=400mA Low Quiescent Current I DD =200µA typ. Input Control Mode Select Function 2-Input Control Phase & Enable Control Standby Function At No Signal At using STB terminal Under Voltage Lock Out (UVLO) Circuit Thermal Shutdown (TSD) Circuit Alarm Output Function (At the protection circuit operates) CMOS Technology Package Outline SSOP20-C3 - -

2 ABSOLUTE MAXIMUM RATINGS (Ta=25 C) PARAMETER SYMBOL RATINGS UNIT Logic Supply Voltage V DD 7 V Motor Supply Voltage 9 V Motor Output Voltage V O 9 V SENSE Terminal Voltage V SENSE 7 V Logic Input Terminal Voltage V IN 7 V Alarm Output Voltage V ALARM 7 V Motor Output Current Io 700 ma Alarm Output Current I ALARM 20 ma Operating Temperature Topr -40 to +85 C Junction Temperature Tj -40 to +50 C Storage Temperature Tstg -50 to +50 C Power Dissipation P D.0 (*) Mounted on 2Layers PCB.5 (*) Mounted on 4Layers PCB W (*): Mounted on glass epoxy board based on EIA/JEDEC. (4.3x76.2x.6mm: 2Layers/4Layers) RECOMMENDED OPERATING CONDITIONS (Ta=25 C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Logic Supply Voltage V DD V Motor Supply Voltage V - 2 -

3 ELECTRICAL CHARACTERISTICS (V DD =V STB = 3.3V, =2 =7.2V, V SENSE =V SENSE2 =0V, Ta=25 C) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT GENERAL Logic block quiescent current I DD Except I IH µa Motor block quiescent current I MM Per each channel µa Standby current I STB V STB =0V - 0. µa INPUT BLOCK H level input voltage V IH V H level input voltage 2 V IH2 V DD =5.0V V L level input voltage V IL V L level input voltage 2 V IL2 V DD =5.0V V H level input current I IIH V IN = 3.3V, per each channel µa L level input current I IL V IN = 0V, per each channel na Input pull down resistance R INDN kω Input pulse widths tp µs Auto switched time to Standby Mode t STB V INA /V INB /V IN2A /V IN2B =0V 2-20 µs ALARM OUTPUT L level voltage V ALARM R ALARM =5kΩ V Leak current I LEAKALARM V ALARM =5.5V µa MOTOR OUTPUT BLOCK High side ON resistance R OH Io=400mA Ω Low side ON resistance R OL Io=400mA Ω High side leak current I OLEAKH =2 =8.0V, V STB =0V µa Low side leak current I OLEAKL =2 =8.0V, V STB =0V µa Sense terminal leak current I SENSELEAK V SENSE =V(SENSE GND), V STB =0V µa Delay time t DELAY At Normal operates ns Delay time 2 t DELAY2 At Release from standby mode ns THERMAL SHUTDOWN BLOCK Thermal shutdown operating temperature T DTSD C Thermal shutdown recovery temperature T RTSD C Thermal shutdown hysteresis T TSD C UNDER VOLTAGE LOCK OUT BLOCK UVLO operating voltage V DUVLO V UVLO recovery voltage V RUVLO V UVLO hysteresis voltage V UVLO V - 3 -

4 PIN CONNECTION STB VDD N.C. INA INB IN2A IN2B ALARM GND VMM N.C. OUTA OUTB SENSE SENSE2 OUT2B OUT2A N.C. VMM2 SSOP20-C3 PIN FUNCTION LIST Pin# Terminal Name Function Remark STB Power Saving State Setting Terminal H= Normal Operation, L=Standby 2 VDD Logic Voltage Supply Terminal Logic Voltage Supply 3 Input Control Method Setting Input Terminal L=2-Input Control Type. H=PHASE&ENABLE Control Type 4 N.C. No Connection No Connection 5 INA ch Output Phase Switch Input Terminal A It works as INA at Terminal=L, PHASE at Terminal=H. 6 INB ch Output Phase Switch Input Terminal B It works as INB at Terminal=L, ENABLE at Terminal=H. 7 IN2A 2ch Output Phase Switch Input Terminal A It works as IN2A at Terminal=L, PHASE2 at Terminal=H. 8 IN2B 2ch Output Phase Switch Input Terminal B It works as IN2B at Terminal=L, ENABLE2 at Terminal=H. 9 ALARM Internal Protection Operation Detection Output Terminal When the internal protection operation is detected, L level is 0 GND Logic Ground Terminal Logic Ground VMM2 Motor Voltage Supply Terminal 2 Motor Voltage Supply 2 N.C. No Connection No Connection 3 OUT2A 2ch Output Terminal A - 4 OUT2B 2ch Output Terminal B - 5 SENSE2 Current Detection Resistance It connects resistance for the detection of the electric current of the side Connection Terminal 2 of 2ch. At the unused time, it connects with GND. 6 SENSE Current Detection Resistance It connects resistance for the detection of the electric current of the side Connection Terminal of ch. At the unused time, it connects with GND. 7 OUTB ch Output Terminal B - 8 OUTA ch Output Terminal A - 9 N.C. No Connection No Connection 20 VMM Motor Voltage Supply Terminal Motor Voltage Supply - 4 -

5 BLOCK DIAGLAM VDD NJU7385 VMM INA INB GATE-DRIVE OUTA OUTB Control Logic SENSE VMM2 IN2A IN2B GATE-DRIVE OUT2A OUT2B STB GND BIAS TSD UVLO SENSE2 ALARM - 5 -

6 THERMAL RESISTANCE CHARACTERISTICS PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Junction - Ambient Thermal Resistance Junction Case Surface Thermal Resistance Junction-Ambient Thermal Resistance 2 Junction Case Surface Thermal Resistance 2 θ ja_ Ψ jt_ θ ja_2 Ψ jt_2 Mounted on glass epoxy board based on EIA/JEDEC. (4.3x76.2x.6mm: 2Layers) Mounted on glass epoxy board based on EIA/JEDEC. (4.3x76.2x.6mm: 2Layers) Mounted on glass epoxy board based on EIA/JEDEC. (4.3x76.2x.6mm: 4Layers) Mounted on glass epoxy board based on EIA/JEDEC. (4.3x76.2x.6mm: 4Layers) C /W C /W C /W C /W TRUTH TABLE ALARM Logic Input Logic Output Logic ALARM STB INA/2A INB/2B OUTA/2A OUTB/2B State Remark L L OFF OFF ALL Turn OFF L H L H L CW L H L H CCW 2-Input Control H H H H H Brake H H/L L OFF OFF ALL Turn OFF PHASE&ENABLE Control H L H L H CCW It works as INA/B=PHASE, H H H L CW INA2/B2=ENABLE L H/L H/L H/L OFF OFF ALL Turn OFF Standby State H/L H/L ALL L ALL L OFF OFF ALL Turn OFF Standby State2 (INA/A2/B/B2=L) L H/L H/L H/L H/L OFF OFF ALL Turn OFF State of Internal Protection Function Operating *OFF= - 6 -

7 FUNCTION DESCRIPTION Auto Standby Function The device can be used for mobile equipments that require batteries. When STB terminal turns to L, Standby State is achieved. On the other hand, 4 terminals (IAA/B,IN2A/2B) are set to L, Standby State2 is achieved, which is unique from other devices. When in Standby State, the device stands by under minimum power consumption. UVLO Function UVLO function goes into action when VDD is less than.8v (typ.). In the event of low VDD, UVLO circuit disables the drivers (OUTA/2A & OUTB/2B), and simultaneously sets the ALARM terminal to L. TSD Function TSD function goes into action when Tj is more than 70 C (typ.). In the event of high Tj, TSD circuit disables the drivers (OUTA/2A & OUTB/2B), and simultaneously sets the ALARM terminal to L. ALARM Output Function In the event of fault conditions (UVLO, or TSD active), the device sets the ALARM terminal to L to provide indication of fault conditions. At the same time, terminals for Motor (OUTA/2A & OUTB/2B) are disabled to prevent damage and unpredictable device operation. STB: Power Saving State Setting Terminal STB set to L puts the device in Standby State. It is a similar condition with Auto Standby State (Standby State2). : Input Control Mode Setting Input Terminal Input Control Mode L 2-Input Control H Phase & Enable Input Control is used to toggle between 2-Input Control and Phase & Enable Input Control. <The features of 2-Input Control> When terminal turns to L, 2-Input Control is selected. One of the features is: 4 Half-Bridges are controlled independently because the input and is in a one-to-one ratio. (INA-OUTA, INB-OUTB, IN2A-OUT2A, IN2B-OUT2B) This input mode is relatively suitable for DC Motor applications. In case of one-way rotation and braking control, it is possible to control 4 DC Motors at the same time. Additionally, in case of using of H-Bridge control, it is available to be achieved precision current control around Zero cross current area by using complementary PWM with PWM-duty control at IAA/B&IN2A/2B terminals. <The features of Phase & Enable Input Control> When terminal turns to H, Phase & Enable Input Control is selected. The logic level of INA/IN2A corresponding to Phase-function decides current direction in H-Bridge control. INB/IN2B correspond to Enable-function. When INB/IN2B are set to L, the drivers (OUTA/2A & OUTB/2B) are disabled. This input mode is relatively suitable for Stepper Motor applications. It is possible to control Half-Step-Mode that needs making the drivers disabled. Additionally, in case of Full-Step-Mode, it is available to be achieved a simple control of Stepper Motor using only 2 wires to INA/IN2A

8 APPLICATION CIRCUIT For Stepper Motor VDD VMM + VDD + NJU7385 VMM INA INB GATE-DRIVE OUTA OUTB M Micro controller/ Microprocessor IN2A Control Logic SENSE VMM2 IN2B GATE-DRIVE OUT2A OUT2B STB BIAS SENSE2 input GND TSD UVLO ALARM For DC Motor / Solenoid VDD + VDD NJU7385 VMM VMM + INA INB GATE-DRIVE OUTA OUTB M Micro controller/ Microprocessor IN2A Control Logic SENSE VMM2 + VMM2 IN2B GATE-DRIVE OUT2A OUT2B M STB BIAS SENSE2 input GND TSD UVLO ALARM - 8 -

9 TIMING CHART 2-INPUT CONTROL MODE 2-INPUT CONTROL MODE STB INA(2A) INB(2B) OUTA(2A) STB STB2 STB CW CCW CW BRAKE CCW CW OUTB(2B) STB STB2 STB t DELAY2 t DELAY t STB t DELAY2 t DELAY t DELAY t DELAY2 Current Path /6 2 4 Output stage with current paths during turn-on, turn off. CW Mode VMM CCW Mode VMM OUTA 6 5 OUTB OUTA OUTB

10 PHASE-ENABLE CONTROL MODE 2-INPUT CONTROL MODE STB INA(2A) INB(2B) OUTA(2A) STB STB2 STB CW CCW CW BRAKE CCW CW OUTB(2B) STB STB2 STB t DELAY2 t DELAY t STB t DELAY2 t DELAY t DELAY t DELAY2 Current Path /6 2 4 Output stage with current paths during turn-on, turn off. CW Mode VMM CCW Mode VMM OUTA 6 5 OUTB OUTA OUTB

11 TYPICAL CHARACTERISTICS 500 V DD -I DD 500 -I MM I DD (ua) I MM (ua) V DD 0.6 -V OL Io=400mA 0.6 -V OH Io=400mA V OL 0.3 V OH

12 TYPICAL CHARACTERISTICS.0 Io-V OL =7.2V.0 Io-V OH =7.2V V OL V OH Io(mA) Io(mA) 2.0 I ALARM -V ALARM 2.8 V DD -V IN V IH V ALARM V IN V IL I ALARM (ma) V DD - 2 -

13 TYPICAL CHARACTERISTICS 0.40 T j -I DD V DD =3.3V 0.40 T j -I MM =7.2V I DD (ma) I MM (ma) Tj( C) Tj( C) 800 T j -V OL Io=400mA =7.2V 800 T j -V OH Io=400mA =7.2V V OL (mv) V OH (mv) Tj( C) Tj( C) [CAUTION] The specifications on this databook are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights