Datasheet LB1913 Datasheet (SANYO)

Page 1

Overview

The LB1913 is a three-phase disk drive motor driver IC that is optimal for use as a 3.5-inch floppy disk drive spindle motor driver.

Functions and Features

• Three-phase full-wave linear drive

• On-chip digital speed control

• Start and stop circuits (active low)

• Speed switching High: 300 rpm, Low: 360 rpm

• Current limiter circuit

• Index comparator circuit

• Index delay circuit

• Thermal protection circuit

Package Dimensions

unit: mm

3222-HSOP28

Monolithic Integrated IC

Ordering number : EN5503

83196HA (0T) No. 5503-1/6

SANYO: HSOP28

[LB1913]

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

FDD Spindle Motor Driver

LB1913

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

max 7.0 V

Maximum output current I

max1 t ≤ 0.5 s 1.0 A

Maximum steady-state output current I

max2 0.7 A Allowable power dissipation Pd max Independent IC 0.5 W Operating temperature Topr –20 to +80 °C Storage temperature Tstg –40 to +150 °C

Parameter Symbol Conditions Ratings Unit

Recommended supply voltage V

4.2 to 6.5 V

Specifications

Absolute Maximum Ratings at Ta = 25°C

Allowable Operating Ranges at Ta = 25°C

Page 2

No. 5503-2/6

LB1913

Note: * These items are design target values and are not tested.

A “high-level” (H) Hall amplifier input means: U

+ > UIN–

+ > VIN–

+ > WIN–

Electrical Characteristics at Ta = 25°C, VCC= 5.0 V

Parameter Symbol Conditions

Ratings

Unit

min typ max

Current drain

CCO

S/S = 5 V (standby mode) 10 µA

S/S = 0 V (normal mode) 12 18 mA

SL bias current I

VSL= 0V 10 µA

SL input low-level voltage V

SLL

0 1.0 V

SL input high-level voltage V

SLH

3.5 V

S/S bias current I

S/S

180 270 µA

S/S low-level voltage V

S/SL

0 0.8 V

S/S high-level voltage V

S/SH

3.5 V

Hall amplifier input bias current I

10 µA

Common-mode input voltage range Vh 1.5 V

–1.0 V Differential-mode input voltage range Vdif 50 200 mVp-p Hall bias output voltage V

HIH

= 5 mA 0.8 V

Leakage current I

S/S = 5 V ±10 µA

Output saturation voltage Vsat I

= 0.7 A, sink + source 1.3 1.8 V

Output leakage current I

1.0 mA Current limiter Vlim 0.27 0.3 0.33 V Control amplifier voltage gain G

–7 dB

Interphase voltage gain difference ∆G

±1 dB

V/I converter source current I

9 14 19 µA

V/I converter sink current I

–

–9 –14 –19 µA

V/I converter current ratio I+/I

–

0.8 1.0 1.2

DSC buffer input current I

DSC

1.0 µA FG Schmitt hysteresis ∆Vsh * 50 mV Number of speed discriminator counts N 1041.5 Discriminator operating frequency F

* 1.1 MHz

Oscillator frequency range F

OSC

* 1.1 MHz

Index output low-level voltage V

IDLIO

= 2 mA 0.4 V

Index output leakage current I

IDL

±10 µA

FG amplifier voltage gain G

* 48 dB

FG amplifier input offset V

FGO

±10 mV

FG amplifier internal reference voltage V

FGB

2.2 2.5 2.8 V

Schmitt hysteresis ∆V

* 50 mV

Index input hysteresis ∆V

* 20 mV

Index common-mode input voltage range V

1.0 VCC–1.0 V

Thermal shutdown circuit operating

TSD * 150 180 °C

temperature Hysteresis ∆TSD * 40 °C

Source → Sink

Hall input

U V W 1 V phase → W phase H H L 2 V phase → U phase L H L 3 W phase → U phase L H H 4 W phase → V phase L L H 5 U phase → V phase H L H 6 U phase → W phase H L L

Truth Table

Page 3

Pin Assignment

No. 5503-3/6

LB1913

Pin no. Pin Pin voltage Equivalent circuit Function

18 U

+ 1.5 V min • U-phase Hall element input

19 U

– VCC–1.0 V max

20 V

+ • V-phase Hall element input

21 V

–

22 W

+ • W-phase Hall element input

23 W

–

24 HB 0.8 V typ • Minus-side pin for applying the Hall bias current

= 5 mA) This pin goes to the open state in the stopped state

and the Hall bias is cut off.

25 FG

+ • FG amplifier plus input

26 FG

– A reference voltage of 2.5 V is generated by the IC

internally.

27 FG

OUT

• FG amplifier minus input

• FG amplifier output pin

28 I

• Index input

1 I

–

Pin Functions

Continued on next page

Page 4

No. 5503-4/6

LB1913

Pin no. Pin Pin voltage Equivalent circuit Function

2 ID Low: 0.4 V max • Index output

High: 4.5 V min

3 CD • Connection for external RC time constant circuit.

4 SS Low: 0.8 V max • Start/stop switching input

High: 3.5 V min This is an active-low input.

5 SL Low: 1.0 V max • Speed switching input

High: 3.5 V min

6 CLK Low: 1.0 V max • Reference clock input

High: Use a clock rate of 1 MHz for 300 and 360 rpm V

–1.0 V min speeds.

7 GND • Ground connection

Connect this pin, pin 14, and the frame to ground.

8 V

• Power supply Provide a well-stabilized power supply so that ripple

and noise do not enter the LB1913 from this pin.

9 Rf • Used for output current detection.

The output current is converted to a voltage and detected by connecting a resistor (Rf) between this pin and VCC. The current limiter operates by detecting the voltage on this pin.

Continued on next page

Continued from preceding page

Page 5

No. 5503-5/6

LB1913

Pin no. Pin Pin voltage Equivalent circuit Function

10 D

• Speed discriminator

11 F

• Frequency characteristics correction Current control system open loop oscillation can be prevented by inserting a capacitor between this pin and ground.

13 U

OUT

• U-phase output

15 V

OUT

• V-phase output

16 W

OUT

• W-phase output

14 PGND • Output transistor ground connection

Continued from preceding page

Index Delay Pulse Timing Chart

Page 6

No. 5503-6/6

LB1913

This catalog provides information as of August, 1996. Specifications and information herein are subject to change without notice.

■ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss.

■ Anyone purchasing any products described or contained herein for an above-mentioned use shall:

➀

Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use:

➁

Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.

■ 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.

Block Diagram