SANYO LB1667M, LB1667, LB1668, LB1668M Datasheet

Ordering number : EN*4944

Monolithic Digital IC

LB1668, 1668M, LB1667, 1667M

Two-Phase Unipolar Drive

Brushless Motor Drivers

Preliminary

Overview

The LB1668 Series are 2-phase unipolar drive brushless motor drivers that feature a wide usable voltage range and a minimal number of required external components. They also support the formation of motor lock protection and automatic recovery circuits.

Functions and Features

•Output protection Zener diodes with variable breakdown voltages

—When the Z1 and Z2 pins are open: VOLM = 57 V

—When the Z1 and Z2 pins are shorted: VOLM = 32 V

—An external Zener diode can be connected between Z1 and VCC.

•Can support both 12-V and 24-V power supplies by changing an external resistor.

•Hall elements can be connected directly.

•1.5-A output current output transistors built in

•Built-in rotation detection function that outputs low when driven and high when stopped (LB1668/M)

•FG signal function that sets FG high when INis low, and sets FG low when INis high (LB1667/M)

•Motor lock protection and automatic recovery functions built in

•Thermal shutdown function

Specifications

Absolute Maximum Ratings at Ta = 25°C

Package Dimensions

unit: mm

3098B-DIP10S

[LB1668, 1667]

SANYO: DIP10S

unit: mm

3111-MFP14S

[LB1668M, 1667M]

SANYO: MFP14S

*: These specifications are subject to change for improvement without notice.

	Parameter	Symbol	Conditions	Ratings	Unit
	Maximum input current	ICC max	t ≤ 20 ms	200	mA
	Output voltage	VOUT		Internal	V
	Output current	IOUT		1.5	A
	Output minus current	IOM		–50	mA
	RD/FG influx current	IRD/IFG		10	mA
	RD/FG voltage	VRD/VFG		30	V
			LB1667M, 1668M: Mounted on a printed circuit board	0.8	W
	Allowable power dissipation	Pd max	(20 × 15 × 1.5 mm3, glass epoxy)
			LB1667, 1668	1.1	W
	Operating temperature	Topr		–30 to +80	°C
	Storage temperature	Tstg		–55 to +150	°C

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

13097HA (OT) No. 4944-1/7

LB1668, LB1668M, LB1667, LB1667M

Allowable Operating Ranges at Ta = 25°C

Parameter	Symbol	Conditions	Ratings	Unit
Input current range	ICC		6.0 to 50	mA
Common-mode input voltage range	VICM		0 to VIN –1.5	V

Electrical Characteristics at Ta = 25°C, ICC = 10 mA

	Parameter	Symbol	Conditions		Ratings		Unit
				min	typ	max
	Output limit voltage	VOLM1	Z1, Z2 open	54	57	60	V
		VOLM2	Z1, Z2 short	31	33	35	V
		Vosat1	IO = 0.5 A		0.95	1.2	V
	Output saturation voltage	Vosat2	IO = 1.0 A		1.15	1.5	V
		Vosat3	IO = 1.5 A		1.4	2.0	V
	VIN voltage	VIN	ICC = 7.0 mA	6.4	6.7	7.0	V
	Amplifier input offset voltage	VOFF		–7.0	0	+7.0	mV
	Amplifier input bias current	IBA		–250			nA
	RD/FG output saturation voltage	VRDsat/VFG sat	IRD/IFG = 5 mA		0.1	0.3	V
	C outflow current	IC1		2.1	3.0	3.9	µA
	C discharge current	IC2		0.31	0.44	0.59	µA
	Comparator input threshold voltage	VTH1		0.77	0.8VIN	0.83	V
		VTH2		0.42	0.45VIN	0.48	V
	Thermal shutdown current operating temperature	TSD	Design target value		180		°C
	Thermal shutdown circuit hysteresis	TSD	Design target value		40		°C

Block Diagram and Application Circuit

Truth Table (LB1667, LB1667M)							Pin Assignments
IN+	IN–	C	OUT1	OUT2		FG
H	L	L	H	L		H
L	H	L	L	H		L
H	L	H	H	H		H
L	H	H	H	H		H
Truth Table (LB1668, LB1668M)
IN+	IN–	C	OUT1	OUT2		RD
H	L	L	H	L		L
L	H	L	L	H		L
H	L	H	H	H		H
L	H	H	H	H		H

No. 4944-2/7

LB1668, LB1668M, LB1667, LB1667M

LB1668M Application Circuits

• 12-V power supply type

• 24-V power supply type

• Circuit for use when large output currents are required and heat dissipation is high.

No. 4944-3/7