Allegro 3966 数据手册
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* Per SEMI G42-88 Specification, Thermal Test Board Standardization for Measuring Junction-to-Ambient Thermal Resistance of Semiconductor Packages.
DUAL FULL-BRIDGE PWM
To reduce on-chip power dissipation, the H-bridge power outputs have been optimized for low saturation voltages. The sink drivers feature the Allegro® patented Satlington® output structure. The Satlington outputs combine the low voltage drop of a saturated transistor and the high peak current capability of a Darlington.
Characteristic
Symbol Test Conditions
Output Drivers
Load Supply Voltage Range Output Leakage Current Output Saturation Voltage
Clamp Diode Forward Voltage Motor Supply Current (No Load)
OUT 1A OUT1B
PHASE 1
LOGIC SUPPLY
V CC
V BB
LOAD SUPPLY
CONTROL LOGIC1
UVLO & TSD
ENABLE 1 RT
SOURCE ENABLE 1
BLANKING
PWM LATCH 1 GATE 1
R
Q S
CURRENT-SENSE
COMPARATOR 1 + –
Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the specified current rating or a junction temperature of 150°C.
The A3966SA is supplied in a 16-pin dual in-line plastic package. The A3966SLB is supplied in a 16-lead plastic SOIC with copper heat sink tabs. The power tab is at ground potential and needs no electrical isolation. The A3966SLB is also available in a lead (Pb) free version, with 100% matte tin leadframe plating.
A3966SLBTR-T Yes Tape and Reel fused leads
RθJA RθJC RθJT (°C/W)
60 38 —
67 — 6
3966 DUAL FULL-BRIDGE PWM MOTOR DRIVER
FUNCTIONAL BLOCK DIAGRAM
OUT 2A OUT 2B +
MOTOR DRIVER
The A3966SA and A3966SLB are designed to drive both windings of a twophase bipolar stepper motor. Each device includes two H-bridges capable of continuous output currents of ±650 mA and operating voltages to 30 V. Motor winding current can be controlled by the internal fixed-frequency, pulse-width modulated (PWM), current-control circuitry. The peak load current limit is set by the user’s selection of a reference voltage and current-sensing resistors. Except for package style and pinout, the two devices are identical.
A3966SA ..................................... 2.08 W* A3966SLB ................................... 1.87 W* Operating Temperature Range, TA ..................................... -20°C to +85°C Junction Temperature, TJ .................................................. +150°C Storage Temperature Range, TS ................................... -55°C to +150°C
OUT1B 6
LOAD SUPPLY
7
V BB
REFERENCE 8 VREF
12 SENSE 2
11 OUT 2B
VCC
10
LOGIC SUPPLY
RC 9 RC
Dwg. PP-066-1
ABSOLUTE MAXIMUM RATINGS
Load Supply Voltage, VBB ...................... 30 V Output Current, IOUT (peak) ........... ±750 mA
FEATURES
■ ±650 mA Continuous Output Current ■ 30 V Output Voltage Rating ■ Internal Fixed-Frequency PWM Current Control ■ Satlington Sink Drivers ■ User-Selectable Blanking Window ■ Internal Ground-Clamp & Flyback Diodes ■ Internal Thermal-Shutdown Circuitry ■ Crossover-Current Protection and UVLO Protection
Dwg. PP-066-2
TRUTH TABLE
PHASE X H L
ENABLE H L L
OUTA Off H L
OUTB Off L H
X = Irrelevant
115 Northeast Cutoff, Box 15036
2
Worceste000
The fixed-frequency pulse duration is set by a user-selected external RC timing network. The capacitor in the RC timing network also determines a userselectable blanking window that prevents false triggering of the PWM currentcontrol circuitry during switching transitions.
RC
CT
OSC
SENSE 1
R1S
SENSE 2
R 2S
CURRENT-SENSE
COMPARATOR 2
+ –
BLANKING
GATE 2
PWM LATCH 2
R
Q S
÷4
REFERENCE
CONTROL LOGIC2
SOURCE ENABLE 2
PHASE2 UVLO & TSD
ENABLE 2
查询A3966SLB-T供应商
3966
Data Sheet 29319.25C
A3966SLB (SOIC)
OUT1A 1 PHASE 1 2 ENABLE 1 3 GROUND 4
V BB LOGIC LOGIC
16 OUT2A 15 PHASE 2 14 ENABLE 2 13 GROUND
SENSE1 5
GROUND
Dwg. FP-036-6
A3966SA (DIP)
SENSE 1 1
LOGIC
OUT1B 2 LOAD SUPPLY 3
REFERENCE 4 VREF
V BB
RC 5 RC
LOGIC SUPPLY
6V
CC
OUT 2B 7
LOGIC
SENSE 2 8
16 ENABLE 1 15 PHASE 1 14 OUT1A 13 GROUND 12 GROUND 11 OUT2A 10 PHASE 2 9 ENABLE 2
Copyright © 1998, 2003 Allegro MicroSystems, Inc.
3966 DUAL FULL-BRIDGE PWM MOTOR DRIVER
ELECTRICAL CHARACTERISTICS at TA = +25°C, VBB = 30 V, VCC = 4.75 V to 5.5 V, VREF = 2 V, VS = 0 V, 56 kΩ & 680 pF RC to Ground (unless noted otherwise)
Always order by complete part number: Part Number Pb-free Packing
Package
A3966SA
– Bulk
16-pin DIP
A3966SLB
– Bulk
A3966SLB-T
Yes Bulk
16-lead SOIC
A3966SLBTR
– Tape and Reel with internally
For each bridge, a PHASE input controls load-current polarity by selecting the appropriate source and sink driver pair. For each bridge, an ENABLE input, when held high, disables the output drivers. Special power-up sequencing is not required. Internal circuit protection includes thermal shutdown with hysteresis, ground-clamp and flyback diodes, and crossover-current protection.
VBB ICEX VCE(SAT)
VF IBB(ON) IBB(OFF)
Operating, IOUT = ±650 mA, L = 3 mH VOUT = 30 V VOUT = 0 V Source Driver, IOUT = -400 mA Source Driver, IOUT = -650 mA Sink Driver, IOUT = +400 mA, VS = 0.5 V Sink Driver, IOUT = +650 mA, VS = 0.5 V IF = 400 mA IF = 650 mA VENABLE1 = VENABLE2 = 0.8 V VENABLE1 = VENABLE2 = 2.4 V
(continuous) .............................. ±650 mA Logic Supply Voltage, VCC .................... 7.0 V Input Voltage, Vin ........ -0.3 V to VCC + 0.3 V Sense Voltage, VS ................................ 1.0 V Package Power Dissipation (TA = 25°C), PD
DUAL FULL-BRIDGE PWM
To reduce on-chip power dissipation, the H-bridge power outputs have been optimized for low saturation voltages. The sink drivers feature the Allegro® patented Satlington® output structure. The Satlington outputs combine the low voltage drop of a saturated transistor and the high peak current capability of a Darlington.
Characteristic
Symbol Test Conditions
Output Drivers
Load Supply Voltage Range Output Leakage Current Output Saturation Voltage
Clamp Diode Forward Voltage Motor Supply Current (No Load)
OUT 1A OUT1B
PHASE 1
LOGIC SUPPLY
V CC
V BB
LOAD SUPPLY
CONTROL LOGIC1
UVLO & TSD
ENABLE 1 RT
SOURCE ENABLE 1
BLANKING
PWM LATCH 1 GATE 1
R
Q S
CURRENT-SENSE
COMPARATOR 1 + –
Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the specified current rating or a junction temperature of 150°C.
The A3966SA is supplied in a 16-pin dual in-line plastic package. The A3966SLB is supplied in a 16-lead plastic SOIC with copper heat sink tabs. The power tab is at ground potential and needs no electrical isolation. The A3966SLB is also available in a lead (Pb) free version, with 100% matte tin leadframe plating.
A3966SLBTR-T Yes Tape and Reel fused leads
RθJA RθJC RθJT (°C/W)
60 38 —
67 — 6
3966 DUAL FULL-BRIDGE PWM MOTOR DRIVER
FUNCTIONAL BLOCK DIAGRAM
OUT 2A OUT 2B +
MOTOR DRIVER
The A3966SA and A3966SLB are designed to drive both windings of a twophase bipolar stepper motor. Each device includes two H-bridges capable of continuous output currents of ±650 mA and operating voltages to 30 V. Motor winding current can be controlled by the internal fixed-frequency, pulse-width modulated (PWM), current-control circuitry. The peak load current limit is set by the user’s selection of a reference voltage and current-sensing resistors. Except for package style and pinout, the two devices are identical.
A3966SA ..................................... 2.08 W* A3966SLB ................................... 1.87 W* Operating Temperature Range, TA ..................................... -20°C to +85°C Junction Temperature, TJ .................................................. +150°C Storage Temperature Range, TS ................................... -55°C to +150°C
OUT1B 6
LOAD SUPPLY
7
V BB
REFERENCE 8 VREF
12 SENSE 2
11 OUT 2B
VCC
10
LOGIC SUPPLY
RC 9 RC
Dwg. PP-066-1
ABSOLUTE MAXIMUM RATINGS
Load Supply Voltage, VBB ...................... 30 V Output Current, IOUT (peak) ........... ±750 mA
FEATURES
■ ±650 mA Continuous Output Current ■ 30 V Output Voltage Rating ■ Internal Fixed-Frequency PWM Current Control ■ Satlington Sink Drivers ■ User-Selectable Blanking Window ■ Internal Ground-Clamp & Flyback Diodes ■ Internal Thermal-Shutdown Circuitry ■ Crossover-Current Protection and UVLO Protection
Dwg. PP-066-2
TRUTH TABLE
PHASE X H L
ENABLE H L L
OUTA Off H L
OUTB Off L H
X = Irrelevant
115 Northeast Cutoff, Box 15036
2
Worceste000
The fixed-frequency pulse duration is set by a user-selected external RC timing network. The capacitor in the RC timing network also determines a userselectable blanking window that prevents false triggering of the PWM currentcontrol circuitry during switching transitions.
RC
CT
OSC
SENSE 1
R1S
SENSE 2
R 2S
CURRENT-SENSE
COMPARATOR 2
+ –
BLANKING
GATE 2
PWM LATCH 2
R
Q S
÷4
REFERENCE
CONTROL LOGIC2
SOURCE ENABLE 2
PHASE2 UVLO & TSD
ENABLE 2
查询A3966SLB-T供应商
3966
Data Sheet 29319.25C
A3966SLB (SOIC)
OUT1A 1 PHASE 1 2 ENABLE 1 3 GROUND 4
V BB LOGIC LOGIC
16 OUT2A 15 PHASE 2 14 ENABLE 2 13 GROUND
SENSE1 5
GROUND
Dwg. FP-036-6
A3966SA (DIP)
SENSE 1 1
LOGIC
OUT1B 2 LOAD SUPPLY 3
REFERENCE 4 VREF
V BB
RC 5 RC
LOGIC SUPPLY
6V
CC
OUT 2B 7
LOGIC
SENSE 2 8
16 ENABLE 1 15 PHASE 1 14 OUT1A 13 GROUND 12 GROUND 11 OUT2A 10 PHASE 2 9 ENABLE 2
Copyright © 1998, 2003 Allegro MicroSystems, Inc.
3966 DUAL FULL-BRIDGE PWM MOTOR DRIVER
ELECTRICAL CHARACTERISTICS at TA = +25°C, VBB = 30 V, VCC = 4.75 V to 5.5 V, VREF = 2 V, VS = 0 V, 56 kΩ & 680 pF RC to Ground (unless noted otherwise)
Always order by complete part number: Part Number Pb-free Packing
Package
A3966SA
– Bulk
16-pin DIP
A3966SLB
– Bulk
A3966SLB-T
Yes Bulk
16-lead SOIC
A3966SLBTR
– Tape and Reel with internally
For each bridge, a PHASE input controls load-current polarity by selecting the appropriate source and sink driver pair. For each bridge, an ENABLE input, when held high, disables the output drivers. Special power-up sequencing is not required. Internal circuit protection includes thermal shutdown with hysteresis, ground-clamp and flyback diodes, and crossover-current protection.
VBB ICEX VCE(SAT)
VF IBB(ON) IBB(OFF)
Operating, IOUT = ±650 mA, L = 3 mH VOUT = 30 V VOUT = 0 V Source Driver, IOUT = -400 mA Source Driver, IOUT = -650 mA Sink Driver, IOUT = +400 mA, VS = 0.5 V Sink Driver, IOUT = +650 mA, VS = 0.5 V IF = 400 mA IF = 650 mA VENABLE1 = VENABLE2 = 0.8 V VENABLE1 = VENABLE2 = 2.4 V
(continuous) .............................. ±650 mA Logic Supply Voltage, VCC .................... 7.0 V Input Voltage, Vin ........ -0.3 V to VCC + 0.3 V Sense Voltage, VS ................................ 1.0 V Package Power Dissipation (TA = 25°C), PD