Sanyo LB1952M Specifications

Ordering number: EN 5132

Monolithic Digital IC

LB1952, 1952M

3-phase Brushless Motor Driver

for VCR Capstans

Functions

3-phase full-wave current linear drive system

Torque ripple correction circuit built in (variable correction factor)

Current limiting circuit built in

Output stage upper/lower oversaturation prevention circuit built in (no external capacitor required)

FG amplifier built in

Thermal shutdown circuit built in

Package Dimensions

unit : mm

3206-QFP34H

[LB1952]

SANYO : QFP34H

3129-MFP36S

[LB1952M]

SANYO : MFP36S

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

92595HA (II) No.5132-1/11

LB1952, 1952M

Specifications

Absolute Maximum Ratings atTa=25°C

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

Maximum output current I

Allowable power dissipation Pd max

Operating temperature Topr –20 to +75 Storage temperature Tstg –55 to +150

Allowable Operating Ranges atTa=25°C

Parameter Symbol Conditions Ratings Unit

Supply voltage

Hall input amplitude V GSENSE input range V

max 7V

max 24 V

max 1.3 A

Arbitrarily large heat sink LB1952 12.5 W Independent IC LB1952 0.77 W Independent IC LB1952M 0.95 W

HALL

GSENSE

Between Hall inputs ±30 to ±80 mV Relative to control system GND –0.20 to +0.20 V

5to22 V

4.5 to 5.5 V

0-P

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

Parameter Symbol Conditions min typ max Unit

supply current I

[Output]

Osat

Output saturation voltage

Osat

Output leakage current Ioleak 1.0 mA [FR] FR pin input threshold voltage V

FSR

FR pin input bias current Ib (FSR) –5.0 µA [Control] CTLREF pin voltage V CTLREF pin input range V

CREF

CTL pin input bias current Ib (CTL) With V CTL pin control start voltage V

CTL

CTL pin control Gm Gm (CTL) [Current Limit] LIM current limit offset voltage Voff (LIM)

LIM pin input bias current Ib (LIM)

LIM pin current limit level I lim [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

Vcm (HALL) 1.3 3.3 V [TRC] Torque ripple correction factor T

ADJ pin voltage Vadj 2.37 2.50 2.63 V

RL= ∞ (when stopped), V

= 500 mA, Rf = 0.5 Ω, Sink + Source

CTL=VLIM

= 1.0 A, Rf = 0.5 Ω, Sink + Source

CTL=VLIM

= 5 V (with saturation prevention)

CTL

=0V,V

= 0 V 12 18 mA

LIM

2.1 2.6 V

2.6 3.5 V

2.25 2.50 2.75 V

2.05 2.15 2.25 V

IN 1.50 3.50 V

= 5 V, CTLREF : Open 4.0 µA

CTL

With Rf = 0.5 Ω,V

(ST)

Hall input logic fixed, (u, v,w=H,H,L) With Rf = 0.5 Ω, ∆I

Hall input logic fixed, (u, v,w=H,H,L)

With Rf = 0.5 Ω,V Hall input logic fixed, (u, v,w=H,H,L)

With V V

LIM

= 5 V, CTLREF : Open,

CTL

=0V

With Rf = 0.5 Ω,V Hall input logic fixed, (u, v,w=H,H,L)

At bottom and peak in Rf waveform at IO= 200 mA (RF=0.5 Ω, ADJ-OPEN) Note 2

=5V,IO^10 mA,

LIM

= 200 mA,

=5V,IO^10 mA,

CTL

=5V,V

CTL

LIM

= 2.06 V,

2.00 2.15 2.30 V

0.46 0.58 0.70 A/V

140 200 260 mV

–2.5 µA

830 900 970 mA

Continued on next page.

No.5132 - 2/11

LB1952, 1952M

Continued from preceding page.

Parameter Symbol Conditions min typ max Unit [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 FG amplifier common-mode

input voltage [Saturation] Saturation prevention circuit

lower set voltage [TSD] TSD operation temperature T-TSD (Design target) Note 1 180 TSD temperature hysteresis

width

Note 1: No measurements are performed for any values listed in the condition column as design targets. Note 2: The torque ripple correction factor is calculated using the Rf voltage waveform as follows.

(FG) At internal pull-up resistor load on sink side 0.5 V

Osat

(FG) 0.5 4.0 V

Osat

∆TSD (Design target) Note 1 20

Voltage between each Out and Rf at I

(DET)

Rf = 0.5 Ω,V

CTL=VLIM

=5V

=10mA,

0.175 0.25 0.325 V

Correction factor =

2 × (Vp − Vb)

Vp + Vb

Truth Table & Control Function

Source → Sink

V→W W→VL U→W W→UL

U→V

V→UL W→V V→WL W→U U→WL

V→U

U→VL

Hall input

UVW

HHL

HLL

HLH

LLH

LHH

LHL

Hall input logic settings

× 100 (%)

GND level

Note: ‘‘H’’ in the FR column represents a voltage of 2.75V or

more; ‘‘L’’ represents a voltage of 2.25V or less. (At V

=5V)

Note: ‘‘H’’ in the hall input columns represents a state in which

‘‘+’’ has a potential which is higher by 0.01 V or more than that of the ‘‘−’’ phase inputs. Conversely, ‘‘L’’ represents a state in which ‘‘+’’ has a potential which is lower by 0.01V or more than that of the ‘‘−’’ phase input.

Note: Since 180° conduction is used as the drive system, other phases than the sink and source phases are turned off.

No.5132 - 3/11

LB1952, 1952M

Control Function & Current Limit Function

Control characteristics

Current limit characteristics

Slope = 0.5 A/V typ

Pin Functions

The pin numbers in ( ) are for MFP.

Pin name Pin No. Function

FR 1 (33) Forward/reverse select pin. The pin voltage selects forward/reverse.

GND 2 (34) GND for other than output transistor. Minimum potential of output transistor is at Rf pin. FGin (–) 5 (3) Input pin when FG amplifier is used with inverted input. Feedback resistor is connected between

FGin (+) 6 (4) Noninverting input pin when FG amplifier is used with differential input. Internal bias is not applied. FG-OUT 8 (5) FG amplifier output pin. Resistive load provided internally. CTL 9 (6) Speed controlpin.Controlis exercised by constant-current drive with current feedback appliedfrom

CTLREF 10 (7) Control reference voltage pin. The voltage is set internally to approx. 0.43 x V

LIM 11 (8) Current limiting function control pin. The output current is varied linearly by this pin voltage; slope

FC 12 (9) Speed control loop frequency characteristic correction pin

, Uin

–

13, 14 (10, 11) 15, 16 (12, 13) 17, 18 (14, 15)

19 (16) Power supply pin for supplying power to all circuits except output section in IC; this voltage must

22 (21) Output section power supply pin

Uin Vin+,Vin Win+, Win

V ADJ 23 (22) Pin for external adjustment of torque ripple correction factor. When this factor is to be adjusted, a

Rf (PWR) Rf (SNS)

Uout Vout Wout

24 (23) 33 (31)

27 (26) 29 (27) 31 (28)

GSENSE 34 (32) GND sensing pin. Byconnecting this pin tothe neighboring GND onthe Rf resistor sideof the motor

(Vth = 2.5 V typ at V

=5V)

this pin and FG-OUT.

Rf. Gm = 0.58 A/V typ at Rf=0.5 Ω

but this can be

varied by applying voltage through a low impedance (input impedance = approx. 4.3 kΩ).

= 0.5 A/V typ at Rf = 0.5 Ω.

U-phase Hall device input pin; logic ‘‘H’’ represent IN+ > IN−. V-phase Hall device input pin; logic ‘‘H’’ represent IN+ > IN−.

W-phase Hall device input pin; logic ‘‘H’’ represent IN+ > IN−.

be stabilized so as to eliminate ripple and noise.

voltage is externally applied to the ADJ pin through a low impedance. If the voltage applied is increased, the factor drops; conversely, if it is reduced, the factor rises. The factor varies between 0 and 2 times that of the open state. (The voltage is set to approx. V impedance is approx. 5 kΩ.)

/2 internally, and the input

Output current detection pin. Current feedback is applied to the control section by connecting Rf between this pin and GND. The lower oversaturation prevention circuit and torque ripple correction circuit are activated in accordance with this pin voltage. Since the oversaturation prevention level is set with this voltage, the lower oversaturation prevention effect may deteriorate in the high current range if the Rf value is reduced to an extremely low level. The PWR and SENSE pins must always be connected.

U-phase output pin V-phase output pin

(Built-in spark killer diode)

W-phase output pin

GND wire which contains Rf, the effect that GND common impedance exerts on Rf can be eliminated. (This pin must not be left open.)

No.5132 - 4/11

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