AP1021AEN

[AP1021] AP1021AEN 32V Dual Microstepping Motor Driver IC with SPI 1. General Description The AP1021 is a complete microstepping motor driver that can drive two stepper motors, to operate up to 28V motor supply voltage. N-channel LDMOS FETs are built in both high and low side for output driver to achieve small package. It also includes under voltage detection and thermal shut down circuits. It is suitable for driving various types of stepper motors. 2. Features             Built-in PWM Current Control Stepper Motor Driver SPI Interface Full Programmable Excitation Mode up to 1/64 step Control Supply Voltage (VC) 3.0V to 5.5V Motor Drive Operating Voltage(VM) 2.0V to 28V H-Bridge On Resistance 1.0 Adjustable PWM Motor Current by VIS pins. Built-in UVLO(Under Voltage Lock Out circuit) Built-in TSD(Thermal Shut Down circuit) Built-in Charge Pump Circuit Operating Temperature Range -40C to +85C Small 32-pin QFN (5mm×5mm) Package 015000428-E-00 2015/01 -1- [AP1021] 3. Table of Contents 1. 2. 3. 4. 5. 6. General Description ................................................................................................................................... 1 Features ...................................................................................................................................................... 1 Table of Contents ....................................................................................................................................... 2 Block Diagram ........................................................................................................................................... 3 Ordering Guide .......................................................................................................................................... 4 Pin Configurations and Functions .............................................................................................................. 4 ■ Pin Configurations ................................................................................................................................... 4 ■ Pin Functions ........................................................................................................................................... 5 7. Absolute Maximum Ratings ...................................................................................................................... 6 8. Recommended Operation Condition.......................................................................................................... 6 9. Electrical Characteristics ........................................................................................................................... 7 10. Functional Descriptions ......................................................................................................................... 8 ■ Enable mode ............................................................................................................................................ 8 ■ ISn terminal current ................................................................................................................................. 9 ■ SPI Interface .......................................................................................................................................... 14 ■ Register map .......................................................................................................................................... 17 ■ Register Description .............................................................................................................................. 17 11. Recommended External Circuits.......................................................................................................... 20 12. Package ................................................................................................................................................ 22 ■ Outline Dimensions ............................................................................................................................... 22 ■ Marking ................................................................................................................................................. 22 13. Revise History ...................................................................................................................................... 23 IMPORTANT NOTICE .................................................................................................................................. 24 015000428-E-00 2015/01 -2- [AP1021] 4. Block Diagram M VM M CVM OUT2A OUT2B OUT3A OUT1B OUT1A OUT4B OUT4A OUT3B VM CVG VG Charge Pump VREF VREF RR1 1/2.5 VIS CIVS RR2 Iout=VIS / (2.5×RIS) OSC H-bridge Current Control UVLO TSD VREF Control Logic VC LV EN SDO CSN,SDI,SCK, IS1 5 OE12,OE34 IS2 IS3 IS4 RIS1 RIS2 RIS3 RIS4 Exposed Pad CLV VC CVC CPU Figure 1. Block Diagram 015000428-E-00 2015/01 -3- [AP1021] 5. Ordering Guide AP1021 AEN -40～85C 32-pin QFN 6. Pin Configurations and Functions OUT3A IS3 IS3 OUT3B VM OUT4A IS4 IS4 24 23 22 21 20 19 18 17 ■ Pin Configurations SCK 25 16 OUT4B SDI 26 15 VC 27 14 LV 13 VREF 12 VIS 11 TEST1 10 EN 9 OUT2B SDO 28 OE12 29 OE34 30 TEST2 31 (Top View) Exposed pad 2 3 2 4 5 6 7 8 IS1 IS1 OUT1B VM OUT2A IS2 IS2 32 1 VG AP1021 OUT1A CSN Exposed Pad must be connected to GND. 015000428-E-00 2015/01 -4- [AP1021] ■ Pin Functions No. Pin Name 1 OUT1A A O Motor driver output 2, 3 IS1 IO Current sense terminal 4 OUT1B A O Motor driver output 5, 20 VM - Motor driver power supply 6 OUT2A A O Motor driver output 7, 8 IS2 IO Current sense terminal 9 OUT2B A O Motor driver output 10 EN D I Chip Enable (Power save) 11 TEST1 A I TEST pin. This pin must be connected to the ground. 12 VIS A I Motor current set voltage input 13 VREF A O Voltage reference 14 LV A O Logic voltage output capacitor connection 15 VC P - Control power supply 16 OUT4B A O Motor driver output 17, 18 IS4 I Current sense terminal 19 OUT4A A O Motor driver output 21 OUT3B A O Motor driver output 22, 23 IS3 IO Current sense terminal 24 OUT3A A O Motor driver output 25 SCK D I Control data clock 26 SDI D I Control data input 27 CSN D I Chip select 28 SDO D I Control data output 29 OE12 D I 30 OE34 D I 31 TEST2 D I 32 VG A IO Charge-pump output voltage EP GND - Ground Exposed Pad Note 1. Note 2. Note 3. Type (Note 1) A P A A A I/O Function (Note 2) Remark 200k Pull-down OUT1/2 Output Enable when SELOE register bit=H OUT3/4 Output Enable when SELOE register bit=H TEST pin. This pin must be connected to the ground. (Note 3) A(analog pin), D(digital pin), GND(ground pin), P(power pin) I(input pin), O(output pin), IO(input/output pin) Exposed Pad must be connected to GND. 015000428-E-00 2015/01 -5- [AP1021] 7. Absolute Maximum Ratings Parameter Control supply voltage Motor driver supply voltage VC level terminal (EN, CSN, SCK, SDI, SDO, OE12, OE34) VM level terminal (OUTnA, OUTnB) 1.8V level terminal (LV, VREF, VIS) 1.2V level terminal (ISn) Symbol VC min -0.5 max 5.5 Unit V VM -0.5 32 V Vterm1 -0.5 VC V Vterm2 -0.5 VM V Vterm3 -0.5 1.9 V Vterm4 -0.5 1.3 V Remark IloadDC 1.2 A Dual use (Note 8) IloadPeak 1.7 A Single use (Note 9) Ipulse 2.8 A Pulsed tw