Datasheet LB1980H Datasheet (SANYO)

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Page 1

Ordering number : EN5974

O3098RM (OT) No. 5974-1/8

Overview

The LB1980H is a 3-phase brushless motor driver that is particularly appropriate for VCR capstan motor drivers.

Functions

· 3-phase full-wave drive

· Built-in torque ripple correction circuit (variable correction ratio)

· Current limiter circuit

· Upper and lower side output stage over-saturation prevention circuit that does not require external capacitors.

· FG amplifier

· Thermal shutdown circuit

Package Dimensions

unit: mm

3233-HSOP28H

SANYO: HSOP28H

[LB1980H]

LB1980H

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Three-Phase Brushless Motor Driver

for VCR Capstan Motors

Monolithic Digital IC

Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.

Allowable power dissipation, Pdmax — W

Ambient temperature, Ta — °C

Independent IC

Page 2

Specifications

Absolute Maximum Ratings at Ta = 25°C

Allowable Operating Ranges at Ta = 25°C

Electrical Characteristics at Ta = 25°C, VCC= 5 V, VS= 15 V

Notes : 1.The torque ripple correction ratio is determined as follows from the Rf voltage waveform. Continued on next page.

2.Parameters that are indicated as design target values in the conditions column are not tested.

No. 5974-2/8

LB1980H

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage

max 7 V

max 24 V

Maximum output current I

max 1.3 A

Mounted on a 71.6

× 114.3 × 1.6 mm glass Epoxy printed

1.81 W

Allowable power dissipation Pd max

circuit board

Independent device 0.77 W Operating temperature Topr –20 to + 75 °C Storage temperature Tstg –55 to + 150 °C

Parameter Symbol Conditions Ratings Unit

Supply voltage

5 to 22 V

4.5 to 5.5 V

Hall input amplitude V

HALL

Between the Hall inputs ±30 to ±80 mVo-p GSENSE pin input range V

GSENSE

With respect to the control system ground –0.20 to + 0.20 V

Parameter Symbol Conditions

Ratings

Unit

min typ max

supply current I

RL = ∞, V

CTL

= 0 V, V

LIM

= 0 V (Quiescent) 12 18 mA

[Outputs]

sat1

= 500 mA, Rf = 0.5 Ω, Sink + Source

2.1 2.6 V

Output saturation voltage

CTL

= V

LIM

= 5 V

(With saturation prevention)

VOsat2

= 1.0 A, Rf = 0.5 Ω, Sink + Source

2.6 3.5 V

CTL

= V

LIM

= 5 V

(With saturation prevention) Output leakage current IOleak 1.0 mA [FR] FR pin input threshold voltage V

FSR

2.25 2.50 2.75 V

FR pin input bias current I

(FSR) –5.0 µA [Control] CTLREF pin voltage V

CREF

2.05 2.15 2.25 V

CTLREF pin input range V

CREFIN

1.50 3.50 V

CTL pin input bias current I

(CTL) With V

CTL

= 5 V and the CTLREF pin open 4.0 µA

CTL pin control start voltage

CTL

(ST)

With Rf = 0.5 Ω, V

LIM

= 5 V, IO≥ 10 mA,

2.00 2.15 2.30 V

Hall input logic fixed (U, V, W = H, H, L)

CTL pin control Gm

Gm (CTL)

With Rf = 0.5 Ω, ∆I

= 200 mA,

0.46 0.58 0.70 A/V

Hall input logic fixed (U, V, W = H, H, L)

[Current Limiter] LIM current limit offset voltage Voff (LIM)

With Rf = 0.5 Ω, V

CTL

= 5 V, IO≥ 10 mA,

140 200 260 mV

Hall input logic fixed (U, V, W = H, H, L)

LIM pin input bias current I

(LIM) With V

CTL

= 5 V and the V

CREF

pin open –2.5 µA

LIM pin current control level I

LIM

With Rf = 0.5 Ω, V

CTL

= 5 V, V

LIM

= 2.06 V,

830 900 970 mA

Hall input logic fixed (U, V, W = H, H, L) [Hall Amplifier] Hall amplifier input offset voltage

Voff (HALL) –6 +6 mV Hall amplifier input bias current IB(HALL) 1.0 3.0 µA Hall amplifier common-mode input voltage range

VCM(HALL) 1.3 3.3 V [TRC]

For the high and low peaks in the

Torque ripple correction ratio TRC Rf waveform when I

= 200 mA. 9 %

(Rf = 0.5 Ω, with the ADJ pin open)

ADJ pin voltage V

ADJ

2.37 2.50 2.63 V [FG Amplifier] FG amplifier input offset voltage Voff (FG) –8 +8 mV FG amplifier input bias current I

(FG) –100 nA

FG amplifier output saturation voltage V

sat (FG)

Sink side, for the load provided by the

0.5 V

internal pull-up resistor

FG amplifier voltage gain V

(FG) For the open loop state with f = 10 kHz 41.5 44.5 47.5 dB

FG amplifier common-mode input voltage V

(FG) 0.5 4.0 V

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Continued from preceding page.

Notes : 1.The torque ripple correction ratio is determined as follows from the Rf voltage waveform.

2.Parameters that are indicated as design target values in the conditions column are not tested.

Truth Table and Control Functions

No. 5974-3/8

LB1980H

Parameter Symbol Conditions

Ratings

Unit

min typ max

[Saturation] Saturation prevention circuit lower

The voltages between each OUT and

side voltage setting

VOsat (DET)

Rf pair when IO= 10 mA, Rf = 0.5 Ω, and 0.175 0.25 0.325 V V

CTL

= V

LIM

= 5 V [TSD] TSD operating temperature TSD Design target value

180 °C

Hysteresis width ∆TSD Design target value

20 °C

Correction ratio =

2 × (Vp– Vb)

100 × (%)

Vp– V

For each Hall logic setting

Ground level

Source → Sink

Hall input

U V W

Phase V → Phase W

H H L

Phase W → Phase V L

Phase U → Phase W

H L L

Phase W → Phase U L

Phase U → Phase V

H L H

Phase V → Phase U L

Phase W → Phase V

L L H

Phase V → Phase W L

Phase W → Phase U

L H H

Phase U → Phase W L

Phase V → Phase U

L H L

Phase U → Phase V L

Note: In the FR column, “H” refers to a voltage of 2.75 V or higher, and “L” refers

to 2.25 V or lower (when V

= 5 V.)

Note: In the Hall input column, “H” refers to the state in the corresponding phase

where the + input is at a potential at least 0.01 V higher than the – input, and “L” refers to the state where the – input is at a potential at least 0.01 V higher than the + input.

Note: Since the drive technique adopted is a 180° technique, phases

other than the sink and source phase do not turn off.

Control Function and Current Limiter Function

Control Characteristics Control Limiter Characteristics

Slope: 0.50 A/V (typical)

OUT

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Pin Descriptions

Pin No. Pin Function Equivalent circuit

Used for external adjustment of the torque ripple correction ratio. Apply a voltage externally with a low-impedance circuit to the ADJ pin to adjust the correction ratio. The correction ratio falls as the applied voltage is increased, and increases as the applied voltage decreases. The torque ripple correction ratio can be modified by factors in the range 0 to 2 times the ratio that applies when his pin is left open. (The pin voltage is set to about V

/2 internally, and the

input impedance is about 5 kΩ.)

23 ADJ

Output block power supply

Output current detection. The control block current limiter operates using the resistor Rf connected between these pins and ground. Also, the lower side saturation prevention circuit and the torque ripple correction circuit operate based on the voltages across this resistor. It is especially important to note that, since the saturation prevention level is set using this voltage, the lower side saturation prevention circuit will become less effective in the high current region if the value of Rf is lowered excessively. Also, the PWR and SENSE pins must be connected together.

U phase output V phase output (Spark killer diodes are built-in.) W phase output

No. 5974-4/8

LB1980H

27 28

OUT

Rf (SENSE)

Rf (PWR)

Ground sensing. The influence of the common ground impedance on Rf can be excluded by connecting this pin to nearest ground for the Rf resistor side of the motor ground wiring that includes Rf. (This pin must not be left open.)

5 GSENSE

Forward/reverse selection. The voltage applied to this pin selects the motor direction (forward or reverse). (Vth = 2.5 V at V

= 5 V (typical))

6 FR

Ground for all circuits other than the output transistors. The lowest potential of the output transistors is that of the Rf pin.

7 GND

Input used when the FG amplifier is used as an inverting input. A feedback resistor must be connected between FG

OUT

and this pin.

Noninverting input used when the FG amplifier is used as a differential input amplifier. No bias is applied internally.

–

FG amplifier output. There is an internal resistive load.10

OUT

Speed control loop frequency characteristics correction.14 FC

Continued on next page.

OUT

Lower side saturation prevention circuit input block

Page 5

Continued from preceeding page.

Pin Assignment

Pin No. Pin Function Equivalent circuit

Control reference voltage. While this pin is set to about

0.43 × V

internally, this voltage can be modified by applying a voltage from a low-impedance circuit. (The input impedance is about 4.3 kΩ).

CTLREF12

CTL

Speed control input. The control implemented is fixed current drive controlled by current feedback from Rf. Gm = 0.58/V (typical) when Rf = 0.5 Ω

LIM

Current limiter function control. The output current can be varied linearly by applying a voltage to this pin. The slope is 0.5 A/V (typical) when Rf = 0.5 Ω.

Power supply for all internal blocks other than the output block. This voltage must be stabilized so that noise and ripple do not enter the IC.

–

U phase Hall element inputs. Logic high is defined as states where IN+> IN

–

V phase Hall element inputs. Logic high is defined as states where IN+> IN

–

W phase Hall element inputs. Logic high is defined as states where IN+> IN

–

15 16

17 18

19 20

No. 5974-5/8

LB1980H

Page 6

Block Diagram

No. 5974-6/8

LB1980H

Control amplifier

Reference

voltage

About

0.43 × V

Forward/ reverse selection

Differential

distribution and

torque ripple

correction

block

Drive distribution circuit and lower side saturation prevention circuit

Feedback amplifier

FG amplifier

Antilogarithm

conversion

and

differential

distribution

Upper side saturation prevention control

Output stage

Hall input synthesis block

(linear matrix)

Synthesized output logarithmic

compression block

Page 7

Sample Application Circuit

No. 5974-7/8

LB1980H

GaAs Hall devices

are recommended.

Hall output

Hall

output

/2 bias

Power system ground

Voltage applied to the

ADJ pin

Current limiter setting

voltage pin

CTLREF voltage pin

Torque command

voltage pin

Forward/reverse

command voltage pin

Page 8

PS No. 5974-8/8

LB1980H

This catalog provides information as of October, 1998. Specifications and information herein are subject to change without notice.

Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer’s products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer’s products or equipment.

SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design.

In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law.

No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd.

Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification” for the SANYO product that you intend to use.

Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties.