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L6238SQT Datasheet(PDF) 4 Page - STMicroelectronics |
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L6238SQT Datasheet(HTML) 4 Page - STMicroelectronics |
4 / 31 page PIN FUNCTIONS PLCC44 PQFP44 TQFP64 Name I/O Function 1 39 56, 57 OUTPUT B I/O DMOS Half Bridge Output and Input B for Bemf sensing. 2 40 58 SPIN SENSE O Toggless at each Zero Crossing of the Bemf. 3 41 59 BRAKE DELAY I Energy Recovery time constant, defined by external R-C to ground. 4 42 60, 61 Rsense 1 O Outputs A+B connections for the Motor Current Sense Resistor to ground 5 43 62 CHARGE PUMP 2 I Negative Terminal of Pump Capacitor. 6, 7, 17, 29, 39, 40 1, 11, 23, 33, 34, 44 * GROUND S Ground terminals. 8 2 4 CHARGE PUMP 1 I Positive terminal of Pump Capacitor. 9 3 5 CHARGE PUMP 3 O Positive terminal of Storage Capacitor. 10 4 6, 7 OUTPUT A I/O DMOS Half Bridge Output and Input A for Bemf sensing. 11, 42 5, 36 9, 10, 52, 53 Vpower S Power Section Supply Terminal. 12 6 11 Vanalog S 12V supply. 13, 32 7, 26 8, 18, 19, 31, 41 N.C N.C Open Terminal 14 8 12 Tdly(0) I Three bits that set the Delay between the detection of the Bemf zero crossing, and the commutation of the next Phase. 15 9 13 Tdly(1) I 16 10 14 Tdly(2) I 18 12 20 OTWARN O Overtemperature Warning Output 19 13 21 SELECT POLE I Selects # of Motor Poles. A zero selects 8, while a one selects 4 poles. 20 14 22 PWM TIMER I Capacitor connected to this pin sets the maximum time allowed for 100% duty cycle during PWM operation 21 15 23 PWM/LINEAR I Selects PWM or Linear Output Current Control 22 16 24 OUTPUT ENABLE I Tristates Power Output Stage when a logic zero. 23 17 25 SEQUENCE I Rising edge will initiate start-up. A Braking rountine is started when this input is brought low. 24 18 26 SEQ INCREMENT I A low to high transition on this pin increments the Output State Sequencer. 25 19 27 SYSTEM CLK I Clock Frequency for the system timer/counters. 26 20 28 MONO/SEQ. INC. CONTROL I A logic one will disable the Monotonicity Detector and Sequence Increment functions. 27 21 29 Falign I Reference Frequency for the opt. Auto-Start Algorithm. If int. start up is not used, this pin must be connected to the System Clock. 28 22 30 PWM COMP O Output of the PWM Comparator 30 24 35 Vlogic S 5V Logic Supply Voltage. 31 25 36 Fmotor O Motor Once-per-Revolution signal. 33 27 37 Vcontrol I Voltage at this input controls he Motor Current 34 28 38 CSA INPUT I Input to the Current Sense Amplifier. 35 29 39, 40 Rsense 2 O Output C connection for the Motor Current Sense Resistor to ground. 36 30 42, 43 OUTPUT C I/O DMOS Half Bridge Output and Input C for Bemf sensing. 37 31 44 gm COMP I A series RC network to ground that defines the compensation of the Transconductance Loop. L6238S 4/31 |
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