LB1975 Monolithic Digital LB1975 Motor Driver Over

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LB1975 Monolithic Digital LB1975 Motor Driver Over

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Ordering number EN6087
LB1975
Monolithic Digital
LB1975
Motor Driver
Overview
LB1975 three-phase brushless motor driver suited direct driving motors conditioners, water heaters, other similar equipment. Since shunt regulator circuit built single power supply operation sharing same power supply motor supported.
Package Dimensions
unit: 3147-DIP28H
[LB1975]
R1.7
12.7 11.2
20.0 27.0
Features
Withstand voltage 45V, output current 2.5A Direct drive output built-in output top-side diodes Built-in current limiter Built-in output circuit
1.93
1.78
SANYO DIP28H
SANYO products described contained herein have specifications that handle applications that require extremely high levels reliability, such life-support systems, aircraft's control systems, other applications whose failure reasonably expected result serious physical and/or material damage. Consult with your SANYO representative nearest before using SANYO products described contained herein such applications. SANYO assumes responsibility equipment failures that result from using products values that exceed, even momentarily, rated values (such maximum ratings, operating condition ranges, other parameters) listed products specifications SANYO products described contained herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
52199RM(KI) 6087-1/12
LB1975 Specifications
Maximum Ratings 25°C
Parameter Power supply voltage Output current Maximum input current Allowable power dissipation Operating temperature Storage temperature Symbol IREG max1 max2 Topr Tstg Conditions Ratings +100 +150 Unit
VREG only With infinite heat sink
Allowable Operating Ranges 25°C
Parameter Supply voltage range Input current range applied voltage output current Symbol IREG Conditions Ratings Unit
VREG
Allowable power dissipation,
With infinite heat sink
only
Ambient temperature,
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LB1975
Electrical Characteristics 25°C,
Parameter Power supply current [Output block] Output saturation voltage Symbol VOsat1 VOsat1 VOsat1 VOsat2 VOsat2 VOsat2 lOLeak lOLeak VFH1 VFH2 1.0A,VO (sink) 1.0A,VO (source) 1.0A,VO (sink) (source) 2.0A,VO (sink) 2.0A,VO (source) 2.0A,VO (sink) (source) -100 1.0A 2.0A VCC-1.5 12.5 0.55 Conditions Ratings Unit mVp-p 3.25 1.59 1.71 27.6 2.35 4.20 0.80 2.46 4.40 1.10 0.65 Vp-p
Output leak current Top-side diode forward voltage
[Hall amplifier] Input bias current Same-phase input voltage range VICM Hall input sensitivity VHIN Hysteresis width (HA) Input voltage [Low] [High] VSLH Input voltage [High] [Low] VSHL (speed pulse output)] Output level voltage VFGL Pull-up resistor value [Current limiter] Limiter 0.45 [Thermal shutdown] Thermal shutdown trigger temperature Desigh target Value (junction temperature) Hysteresis width Desigh target Value (junction temperature) [Low-voltage protection] Activation voltage VLVSD Deactivation voltage VLVSD (OFF) Hysteresis width VLVSD [PWM oscillator] Output High level voltage (OSC) 2.95 Output level voltage (OSC) 1.38 Amplitude VOSC 1.50 Ocillator frequency fOSC 2200 19.6 Charge current ICHG -110 Discharge resistance RDCHG [VREG pin] voltage VREG IREG [VCTL pin] Input voltage VCTL1 Output duty VCTL2 Output duty 100% Input bias current (CTL) VCTL (CTL) VCTL [VCTL amplifier] Reference voltage VCREF 2.23 Output voltage VCOUT1 VCTL 3.90 VCOUT2 VCTL 0.60 [Start/stop pin] High level input voltage range (S/S) VCC-1.5 level input voltage range (S/S) Input open voltage (S/S) VCC-0.5 Hysteresis width (S/S) 0.35 High level input current (S/S) (S/S) level input current (S/S) (S/S) -280
0.50 3.10 1.45 1.65 23.0
0.50 -210
Continued next page 6087-3/12
LB1975
Continued from preceding page Parameter [Forward/reverse pin] High level input voltage range level input voltage range Input open voltage Hysteresis width High level input current level input current Symbol Conditions VCC-1.5 VCC-0.5 0.35 -280 Ratings 0.65 Unit
(F/R) (F/R) (F/R) (F/R) (F/R) (F/R) (F/R) (F/R)
0.50 -210
Assignment
VCOUT VCTL (NC) VCREF
GND1
LB1975
view
A11950
VREG
(NC) OUT1 OUT2 OUT3 (NC) (NC) GND3 GND2
Truth Table
Input Forward/reverse control Output Source Sink OUT2 OUT1 OUT1 OUT2 OUT3 OUT1 OUT1 OUT3 OUT3 OUT2 OUT2 OUT3 OUT1 OUT2 OUT2 OUT1 OUT1 OUT3 OUT3 OUT1 OUT2 OUT3 OUT3 OUT2 output
Forward rotation Reverse rotation High 1.5V VCC-1.5V
output
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LB1975
Duty VCTL characteristics
Duty
VCTL1
Control voltage, VCTL
VCTL2
Block Diagram Peripheral Circuitry
VREG
LVSD
Hys.Amp
OUT1 Logic OUT2 OUT3
VCTL VCTL VCTL 2.35V VCREF VCOUT GND1 GND2 GND3 Current Limiter 0.5V
A11952
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LB1975
Function
number name voltage 4.5V 6.7V VREG 0.0V 7.3V Equivalent circuit function Power supply blocks other than output block Shunt regulator output (7V)
A11953
0.0V
Start/stop control Low: start High Open: stop
3.8k
Typical threshold voltage approx. 2.8V (Low High) approx. 2.3V (High Low)
A11954
0.0V
Forward/reverse Low: forward High Open: reverse
3.8k
Typical threshold voltage approx. 2.8V (Low High) approx. 2.3V (High Low)
A11955
OUT1 OUT2 OUT3 0.0V
Output Output Output Output current detect pin. Connect resistor between this ground. Output current limited value with VRF/Rf. (Current limiter operation)
0.5V
A11956
GND3
Output block power supply Output block ground Continued next page
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LB1975
Continued from preceding page number name voltage GND1 GND2 0.0V
Equivalent circuit
function Ground blocks other than output block Speed pulse output with built-in pull-up resistor Speed pulse output with built-in pull-up resistor
A11957
IN1+ IN1- IN2+ IN2- IN3+ IN3-
1.5V VCC-1.5V
Hall input High input input
A11958
1.0V
94µA 2.1k
This sets oscillation frequency. Connect capacitor between this ground.
A11959
VCTL
0.0V 6.7V
Output duty cycle control VCTL VCTL1 Duty cycle VCTL1 VCTL VCTL2 Duty cycle controlled VCTL VCTL VCTL2 Duty cycle 100%
2.35V
A11960
Continued next page
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LB1975
Continued from preceding page number name voltage VCREF 0.0V VCC-2.0V Equivalent circuit function VCTL amplifier internal reference voltage (2.35V)
100µA
23.5k
A11961
VCOUT
0.7V VCC-0.7V
VCTL amplifier output
A11962
6087-8/12
LB1975
Description Direct drive This (LB1975) employs direct drive principle. Motor rotation speed controlled varying output duty cycle according analog voltage input (VCTL). This eliminates need alter motor power supply voltage. Compared previous using principle (such Sanyo LB1690), this allows simplification power supply circuitry. VCTL input directly supplied microcontroller, motor speed can, therefore, controlled directly from microcontroller. PWM, source-side output transistors switched that duty tracks VCTL input. output duty cycle controlled over range 100% VCTL input. frequency oscillator frequency fPWM [Hz] capacitance [pF] connected between GND. following equation applies: fPWM (1.97 Because output transistor on/off switching subject delay, setting frequency very high value will cause delay become noticeable. frequency therefore should normally kept below (typ.), which achieved with capacitance 1300 higher. reference, source-side output transistor switching delay time about about OFF. Output diodes Because switching operation carried source-side output transistors, Schottky barrier diodes must connected between pins (OUT1 OUT3). diodes with average forward current rating range accordance with motor type current limiting requirements. Schottky barrier diodes connected externally, Schottky barrier diodes with high forward voltage (VF) used, internal parasitic diode between becomes active. When this happens, output logic circuit malfunction, resulting feedthrough current output which destroy output transistors. prevent this possibility, Schottky barrier diodes must used dimensioned properly. larger externally connected Schottky barrier diodes, hotter more likely parasitic diodes between become active more likely malfunction occur. Schottky barrier diodes must determined that output malfunction does occur also when becomes hot. malfunction occurs, choose Schottky barrier diode with lower Protection circuits 4.1. voltage protection circuit When voltage falls below stipulated level (VLVSD), voltage protection circuit cuts sourceside output transistors prevent related malfunction. 4.2. Thermal shutdown circuit (overheat protection circuit) When junction temperature rises above stipulated value (TSD), thermal shutdown circuit cuts source-side output transistors prevent damage overheating. Design application heat characteristics that protection circuit will triggered under normal circumstances. 4.3. Current limiter current limiter cuts source-side output transistors when output current reaches preset value (limiter value). This interrupts source current thereby limits output current peak value. connecting resistance between ground, output current detected voltage. When voltage reaches 0.5V (typ.), current limiter activated. performs on/off control source-side output transistors, thereby limiting output current value determined /Rf.
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LB1975
Hall input circuit Hall input circuit differential amplifier with hysteresis (typ.). operation level must within same-phase input voltage range (1.5V 1.5V). prevent noise other adverse influences, input level should least times hysteresis (120 mVp-p). noise Hall input problem, noisecanceling capacitor (about 0.01 should connected across Hall input pins. output circuit Hall input signal IN1, IN2, combined subject waveform shaping before being output. signal same frequency Hall input, signal frequency that three times higher. Start/stop control circuit start/stop control circuit turns source-side output transistors (motor stop) when High signal input when Open. When signal input pin, source-side output transistors turned normal operation state established (motor start). Forward/Reverse switching This designed under assumption that forward/reverse switching carried while motor running. switching carried while motor running, reverse torque braking occurs, leading high current flow. current limiter triggered, source-side output transistors switched off, sink-side output transistors into short brake condition. However, because current limiter this cannot control current flowing sink-side output transistors, these destroyed short brake current. Therefore switching while motor running permissible only output current (IO) limited maximum 2.5A using motor coil resistance other suitable means. switching should carried only while High signal input Open (stop condition), while VCTL conforms following condition: VCTL VCTL1 (duty cycle 0%). other condition, switching will result feedthrough current. should therefore fixed (forward) High Open (reverse) during use. VCC, power supplies When power supply voltage (VCC, rises very quickly when power first applied, feedthrough current occur output. current remains below about 0.2A 0.3A, does pose problem, such possibility should still prevented slowing down voltage rise power-on. Especially High Open (reverse), quick rise likely cause feedthrough current. This should prevented ensuring that V/µs less. Feedthrough current also prevented first switching then during poweron. sequence power-down should follows. Provide stop input duty ratio input VCTL pin. When motor come full stop, switch then VCC. power switched while motor still rotating current flowing motor coil (including motor restraint inertia rotation), counterelectromotive current kickback current flow side, depending motor type power-off procedure. this current cannot absorbed power supply capacitor, voltage rise exceed absolute maximum rating Ensure that this does happen through proper design power supply through capacitor. Because (LB1975) incorporates shunt regulator, used single power supply. this case, supply (6.3 typ.) VREG external transistor resistor. When using regulator, leave VREG open.
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LB1975
Power supply stabilizing capacitors line fluctuates drastically, low-voltage protection circuit activated mistake, other malfunctions occur. line must therefore stabilized connecting capacitor least several between GND. Because large switching current flows line, wiring inductance other factors lead voltage fluctuations. line also fluctuates, line must stabilized connecting capacitor least several between GND, prevent exceeding VMmax other problems. Especially when long wiring runs (VM, VCC, GND) used, sufficient capacitance should provided ensure power supply stability. VCREF pin, VCOUT These pins always used Open condition. chattering occurs switching output, connect capacitor (about between VCREF ground between VCOUT GND. heat dissipation fins heat sink mounted heat dissipation fins this connected GND. sink should electrically open. Sample calculation internal power dissipation (approximate) calculation assumes following parameters: Source-side output transistor duty cycle (PWM control) Output current average current) power dissipation 0.07W Output drive current power dissipation 0.33W Source-side output transistor power dissipation (source) Duty (on) 0.9V 0.72W Sink-side output transistor power dissipation (sink) 1.1V 1.10W Total internal power dissipation 2.22W temperature rise measurement Because chip temperature cannot measured directly, measurement according following procedures should always carried out. 14.1. Thermocouple measurement thermocouple element mounted heat dissipation fin. This measurement method easy implement, will subject measurement errors temperature stable. 14.2. Measurement using internal diode characteristics This recommended measurement method. makes parasitic diode incorporated between GND. High measure voltage parasitic diode calculate temperature. (Sanyo data: temperature characteristics about mV/°C) pins Because pins electrically open, they used wiring purpose etc.
6087-11/12
LB1975
Specifications SANYO products described contained herein stipulate performance, characteristics, functions described products independent state, guarantees performance, characteristics, functions described products mounted customer's products equipment. verify symptoms states that cannot evaluated independent device, customer should always evaluate test devices mounted customer's products equipment. SANYO Electric Co., Ltd. strives supply high-quality high-reliability products. However, semiconductor products fail with some probability. possible that these probabilistic failures could give rise accidents events that could endanger human lives, that could give rise smoke fire, that could cause damage other property. When designing equipment, adopt safety measures that these kinds accidents events cannot occur. Such measures include limited protective circuits error prevention circuits safe design, redundant design, structural design. event that SANYO products(including technical data,services) described contained herein controlled under applicable local export control laws regulations, such products must exported without obtaining export license from authorities concerned accordance with above law. part this publication reproduced transmitted form means, electronic mechanical, including photocopying recording, information storage retrieval system, otherwise, without prior written permission SANYO Electric Co., Ltd. information described contained herein subject change without notice product/technology improvement, etc. When designing equipment, refer "Delivery Specification" SANYO product that intend use. Information (including circuit diagrams circuit parameters) herein example only guaranteed volume production. SANYO believes information herein accurate reliable, guarantees made implied regarding infringements intellectual property rights other rights third parties.
This catalog provides information May, 1999. Specifications information herein subject change without notice. 6087-12/12

LB1975 Monolithic Digital LB1975 Motor Driver Over

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