SANYO LB1987M, LB1987H, LB1987D, LB1987 Datasheet

Ordering number : ENN6109A

Monolithic Digital IC

LB1987, 1987D, 1987M, 1987H

Three-Phase Brushless Motor Driver

for VCR Capstan Motors

Overview

The LB1987, LB1987D, LB1987M, and LB1987H are optimal capstan motor drivers for use in VCR sets.

Functions

•Three-phase full-wave current-linear drive

•Torque ripple correction circuit (fixed correction ratio)

•Current limiter circuit with control characteristics gain switching

•Oversaturation prevention circuits for both the upper and lower sides of the output stage (No external capacitors are required.)

•FG amplifier

•Thermal shutdown circuit

Package Dimensions

unit: mm

3240-QFP34H-B

			[LB1987]
			13.2
		1.6	10.0
	1.6		4.8	0.8	1.0		0.2
		23		18
		1.0
		24			17
13.2	10.0	0.8					8.4
		0.35
		34			7
		1		6
							2.2
			4.0		0.1	1.0	SANYO: QFP34H-B

3147B-DIP28H

[LB1987D]

	28		15
8.4	R1.7		12.7	11.2
				0.4
	1	20.0	14
		27.0
			4.0
			4.0
1.93	1.78	0.6	1.0	SANYO: DIP28H

3129-MFP36S-LF

	[LB1987M]
36	19
	7.9		9.2	10.5
1	18	0.25	0.65
15.3

			2.25	2.5max
0.4	0.8	0.85	0.1	SANYO: MFP36S-LF

3233-HSOP28H

[LB1987H]

15.3

6.2

	28	2.7	15	0.65
7.9			4.9	10.5
	1		14	0.25
	0.8	0.3
0.85				1.3

	2.25
2.5max	0.1	SANYO: HSOP28H

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.

SANYO Electric Co.,Ltd. Semiconductor Company

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

81299RM (OT) No. 6109-1/17

LB1987, 1987D, 1987M, 1987H

Specifications

Absolute Maximum Ratings at Ta = 25°C

	Parameter	Symbol	Conditions	Ratings	Unit
	Maximum supply voltage	VCC max		7	V
		VS max		24	V
	Maximum output current	IO max		1.3	A
			(LB1987)	0.77	W
	Allowable power dissipation	Pd max	(LB1987D)	3.0	W
			(LB1987M)	0.95	W
			(LB1987H)	0.77	W
	Operating temperature	Topr		–20 to +75	°C
	Storage temperature	Tstg		–55 to +150	°C

Allowable Operating Ranges at Ta = 25°C

Parameter	Symbol	Conditions	Ratings	Unit
Supply voltage	VS		5 to 22	V
	VCC		4.5 to 5.5	V
Hall input amplitude	VHALL	Between Hall inputs	±30 to ±80	mVo-p
GSENSE pin input range	VGSENSE	Relative to the control system ground	–0.20 to +0.20	V

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

	Parameter	Symbol	Conditions		Ratings		Unit
				min	typ	max
	VCC current drain	ICC	RL = ∞ , VCTL = 0 V (Quiescent)		12	18	mA
	[Outputs]
		Vosat1	IO = 500 mA, Rf = 0.5 Ω , Sink + Source,		2.1	2.6	V
			VCTL = VLIM = 5 V (With saturation prevention)
	Output saturation voltage
		Vosat2	IO = 1.0 A, Rf = 0.5 Ω , Sink + Source,		2.6	3.5	V
			VCTL = VLIM = 5 V (With saturation prevention)
	Output leakage current	IOleak				1.0	mA
	[FR]
	FR pin input threshold voltage	VFSR		2.25	2.50	2.75	V
	FR pin input bias current	Ib(FSR)		–5.0			µA
	[Control]
	CTLREF pin voltage	VCREF		2.37	2.50	2.63	V
	CTLREF pin input range	VCREFIN		1.70		3.50	V
	CTL pin input bias current	Ib(CTL)	VCTL = 5 V, CTLREF: open			8.0	µA
	CTL pin control start voltage	VCTL(ST)	Rf = 0.5 Ω , VLIM = 5 V, IO ≥ 10 mA	2.20	2.35	2.50	V
			With the Hall input logic states fixed at (U, V, W = H, H, L)
	CTL pin control switching voltage	VCTL(ST2)	Rf = 0.5 Ω , VLIM = 5 V	3.00	3.15	3.30	V
	CTL pin control Gm1	Gm1(CTL)	Rf = 0.5 Ω , IO = 200 mA	0.52	0.65	0.78	A/V
			With the Hall input logic states fixed at (U, V, W = H, H, L)
	CTL pin control Gm2	Gm2(CTL)	Rf = 0.5 Ω , VCTL = 200 mV	1.20	1.50	1.80	A/V
			With the Hall input logic states fixed at (U, V, W = H, H, L)
	[Current Limiter]
	LIM current limiter offset voltage	Voff(LIM)	Rf = 0.5 Ω , VCTL = 5 V, IO ≥ 10 mA	140	200	260	mV
			With the Hall input logic states fixed at (U, V, W = H, H, L)
	LIM pin input bias current	Ib(LIM)	VCTL = 5 V, VCREF: open, VLIM = 0 V	–2.5			µA
	LIM pin current limit level	ILIM	Rf = 0.5 Ω , VCTL = 5 V, VLIM = 2.06 V	830	900	970	mA
			With the Hall input logic states fixed at (U, V, W = H, H, L)
	[Hall Amplifiers]
	Input offset voltage	Voff(HALL)		–6		+6	mV
	Input bias current	Ib(HALL)			1.0	3.0	µA
	Common-mode input voltage	Vcm(HALL)		1.3		3.3	V
	Torque ripple correction ratio	TRC	At the bottom and top of the Rf waveform		9		%
			when IO = 200 mA. (Rf = 0.5 Ω ) (Note 1)
	[FG Amplifier]
	FG amplifier input offset voltage	Voff(FG)		–8		+8	mV
	FG amplifier input bias current	Ib(FG)		–100			nA
	FG amplifier output saturation voltage	Vosat(FG)	At the sink side internal pull-up resistor.			0.5	V
	FG amplifier common-mode input voltage	VCM(FG)		0.5		4.0	V

Continued on next page.

No. 6109-2/17

LB1987, 1987D, 1987M, 1987H

Continued from preceding page.

Parameter	Symbol				Conditions		Ratings		Unit
						min	typ	max
[Saturation Prevention]
Saturation prevention circuit	Vosat(DET)	IO = 10 mA, Rf = 0.5 Ω ,				0.175	0.25	0.325	V
lower side voltage setting		V	= L	VIM	= 5 V, The voltage between each OUT and Rf.
		CTL
[Schmitt Amplifier]
Duty ratio	DUTY	Under the specified conditions				47	50	53	%
Upper side output saturation voltage	Vsatu(SH)					4.8			V
Lower side output saturation voltage	Vsatd(SH)							0.2	V
Hysteresis	Vhys					32	50	60	mV
Thermal shutdown operating	T-TSD	*					170		°C
temperature

Note: * Items marked with an asterisk are design target values and are not measured.

Note: 1. The torque ripple correction ratio is determined from the Rf voltage waveform as shown below.

Vp

Vb

1

2

3

4

5

6

Hall Logic Settings

GND level

2 · (Vp – Vb) Correction ratio = ——————— 100 · (%)

Vp + Vb

A12204

Truth Table and Control Functions

	Source → sink		Hall input			FR
		U	V		W
1	V → W	H	H		L	H
	W → V					L
2	U → W	H	L		L	H
	W → U					L
3	U → V	H	L		H	H
	V → U					L
4	W → V	L	L		H	H
	V → W					L
5	W → U	L	H		H	H
	U → W					L
6	V → U	L	H		L	H
	U → V					L

Note: 1. The “H” state for FR means a voltage of 2.75 V or higher, and the “L” state means a voltage of 2.25 V or lower. (When VCC = 5 V.)

2.For the Hall inputs, the input “H” state means the state in which the

(+) input for that phase is at least 0.01 V higher than the (–) input for that phase. Similarly, the “L” state means the state in which the (+) input for that phase is at least 0.01 V lower than the (–) input for that phase.

3.Since this drive technique is a 180° power application technique, the phase that is neither the source phase nor the sink phase does not turn completely off.

No. 6109-3/17

LB1987, 1987D, 1987M, 1987H

Control and Current Limiting Functions

Control characteristics

Current limiting characteristics

				VLIM = 5 V						VCTL = 5 V
				VLIM = 5 V						VCTL = 5 V
				CTLREF: open						CTLREF: open
				CTLREF: OPEN						CTLREF: OPEN
OUT						OUT
I						I
				Gm2 = 1.50 A/V typ					Slope = 0.50 A/V typ
				Gm2 = 1.50 A/Vtyp
	Gm1 = 0.65 A/V typ
	Gm1 = 0.65 A/Vtyp
0	1	2	3	4	5	0	1	2	3	4	5

	VCTL	VLIM
.	3. V	200 mV typ
2.35 Vtyp	3.15 Vtyp	200 mVtyp

Pin Functions

Pin

Function

Equivalent circuit diagram

UIN+

U phase Hall element input.

UIN–

Logic H refers to the state where IN+ > IN–

(+) inputs

(–) inputs

VIN+

V phase Hall element input.

200 Ω

200 Ω

VIN–

Logic H refers to the state where IN+ > IN–

100 µA

WIN+

W phase Hall element input.

A12207

WIN–

Logic H refers to the state where IN+ > IN–

UOUT

U phase output.

Vs

VOUT

V phase output.

(These pins include internal spark killer diodes.)

VCC

WOUT

W phase output.

OUT for

150 µA

VS

Output block power supply.

each phase

Lower side oversaturation

prevention circuit input

block

VCC

Output current detection.

200 Ω

kΩ

10 µA

Current feedback is applied to the control block by inserting the resistor Rf

30

between these pins and ground. Also, both the lower side saturation

Rf(POWER)

prevention circuit and the torque ripple correction circuit operate according to

200 kΩ

Rf(SENSE)

the voltage on this pin. In particular, since this voltage sets the

oversaturation prevention level, the lower side oversaturation prevention

Rf(POWER)

Rf(SENSE)

operation can be degraded if the value of this resistor is set too low.

Note that the PWR pin and the SENSE pin must be connected together.

A12208

Speed control.

CTL

This circuit implements constant current drive based on current feedback

from the Rf pin.

VCC

VCC

VCC

Gm = 0.58 A/V typ at Rf = 0.5 Ω

CTL

kΩ

200 µA

5

Current limiter function control.

CTLREF

max

200

Ω

200 Ω

LIM

The output current can be modified linearly by the voltage on this pin.

LIM

Ω

Slope = 0.5 A/V typ at Rf = 0.5 Ω

5 k

200 Ω

100 µA

CTLREF

A12209

(LB1987/D)

Continued on next page.

No. 6109-4/17

LB1987, 1987D, 1987M, 1987H

Continued from preceding page.

Pin	Function
	Forward/reverse selection.
FR	The direction (forward or reverse) is selected by the voltage applied to this
	pin.
	(Vth = 2.5 Vtyp at VCC = 5 V)
	External torque ripple correction ratio adjustment.
	To adjust the correction ratio, apply the stipulated voltage to the ADJ pin	FR
	from a low-impedance external circuit.
	If the applied voltage is increased, the correction ratio falls, and if the applied
ADJ	voltage is lowered, the correction ratio increases.
	The range of variation is from 0 to two times the correction ratio when the pin
	is left open.
	(This pin is set to about VCC/2 internally, and has an input impedance of
	about 5 kΩ .)
FGIN–	Input used when the FG amplifier inverting input is used. Connect a
	feedback resistor between the FGOUT pin and this pin.
	Non-inverting input used when the FG amplifier is used as a differential input
FGIN+	amplifier.
	No bias is applied internally.
FGOUT	FG amplifier output.
	This pin includes an internal load resistor.

FC	Speed control loop frequency characteristics correction.

Ground for all systems other than the output transistors.

GND Note that the lowest potential of the output transistors is determined by the Rf pin.

FG pulse output.

FGS This pin includes an internal load resistor. (The output impedance is about 3 kΩ .)

Power supply for all IC internal circuits other than the output block.

VCC This power supply must be stabilized to prevent ripple or other noise from entering the circuit.

Equivalent circuit diagram

VCC		VCC	VCC	VCC
			20 µA
200 µA		kΩ		kΩ
	ADJ	10		10
200 Ω		6 kΩ	500 Ω	6 kΩ
	1/2
		kΩ		kΩ
	VCC
		10		10
				A12210

	5 µA
FGin(–)	FGin(+)
300 Ω	300 Ω

A12211

V	CC	V	CC	VCC
kΩ		kΩ
10		2	FGOUT	kΩ
		Ω	300 Ω	10
				FC
		100

A12212

VCC	VCC VCC
kΩ	kΩ
10	5	FGS

A12517

Ground sensing.

The influence of the common ground impedance on Rf can be excluded by GSENSE connecting this pin to ground near the Rf resistor side of the motor ground

wiring that includes Rf.

(This pin must not be left open.)

13.2 kΩ

GSENSE

A12518

No. 6109-5/17

LB1987, 1987D, 1987M, 1987H

Pin Assignment

RF(PWR) 24

25

26

UOUT 27

28

VOUT 29

30

WOUT 31

32

RF(SENSE) 33

GSENSE 34

GND		Vs		FRAME				FRAME		V		W
										CC		–
												IN
23		22		21				20		19		18

LB1987

1

2

3

4

5

6

FR

GND

FRAME

FRAME

FG

FG

–

+

IN

IN

17 WIN+

16 VIN–

15 VIN+

14 UIN–

13 UIN+

12 FC

11 LIM

10 CTLREF

9 CTL

8 FGS

7 FGOUT

Top view

A12217

Note: The FRAME pins must be connected to ground for ground potential stabilization.

Pd max — Ta

— W	1.0
Pdmax	0.8
		0.77 W
dissipation,
	0.6
power	0.4				0.46 W
Allowable	0.2
	0	0	20	40	60	80	100
	–20

Ambient temperature, Ta — °C

No. 6109-6/17