Document
Ordering number : ENA2077
LB11964FA
Monolithic Digital IC
Single-Phase Full-Wave Fan Motor Driver
http://onsemi.com
Overview
The LB11964FA is a single-phase bipolar drive fan motor driver.
Features
• Single-phase full-wave drive • Built-in regeneration circuit allows the use of reverse connection prevention diodes • Built-in thermal shutdown circuit
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum output voltage Maximum output current Maximum output voltage FG pin maximum output voltage
VCC max IOUT max VOUT max
VR max
15 V 0.5 A 15 V 15 V
FG maximum output current
IR max
5 mA
Allowable power dissipation
Pd max
When mounted on a circuit board *
400 mW
Operating temperature range
Topr
-30 to +85
°C
Storage temperature range
Tstg
-55 to +150
°C
* Specified circuit board : 20.0 × 10.0 × 0.8mm3, paper phenol, wiring density: 20%.
Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time.
Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current,
high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013 May, 2013
70412 SY 20120417-S00002 No.A2077-1/5
Allowable Operating Ranges at Ta = 25°C
Parameter Supply voltage Hall sensor input common-mode input voltage range
Symbol VCC VICM
LB11964FA
Conditions
Ratings 3.5 to 13.8
0.2 to VCC – 1.5
Unit V V
Electrical Characteristics Unless otherwise specified Ta = 25°C, VCC = 5V
Parameter
Symbol
Conditions
Circuit current
ICC Drive mode (CT = L) Lock protection mode (CT = H)
Lock detection capacitor charge current Capacitor discharge current
ICT1 ICT2
VCT = 0.2V VCT = 3.2V
Capacitor charge/discharge current ratio CT charge current
RCT VC1
RCD = ICT1/ICT2
CT discharge current
VC2
Output low-level voltage Output high-level voltage Hall sensor input sensitivity
FG output pin low-level voltage
VOL VOH VHN
VRD
IO = 200mA IO = 200mA Zero peak value (including offset and hysteresis) IRD = 5mA
FG output pin leakage current
IRDL
VRD = 7V
Thermal shutdown operating temperature
TSD
Design target value*
* The design specification items are design guarantees and are not measured.
min
1.1 0.15
5.0 2.6 1.5 3.9
150
Ratings typ 9.0 3.0 1.8
0.25 7.0
2.9 1.8 0.2 4.1
7
0.1
180
max 14 5.0 2.6
0.40 9.0
3.2 2.1 0.3
15
0.3 30 210
Unit
mA mA μA
μA -
V V V V mV
V μA °C
Package Dimensions
unit : mm (typ) 3427
3.0 8
Pd max -- Ta
500
Mounted on specified board:20mm × 10mm × 0.8mm3 paper phenol board.
400
Allowable power dissipation, Pd max –mW
3.0 4.9 0.55
12 0.65
0.33 0.18
1.1 MAX
0.08
SANYO : Micro8
300
200 208
100
0 -30 -10 10 30 50 70 90 110
Ambient temperature, Ta – °C
No.A2077-2/5
LB11964FA
Truth Table
IN+ IN-
CT
OUT1
OUT2
FG
Mode
High
Low
Low
Low High
Off
When the motor is turning (*1)
Low High Low High Low Low
-
-
High
Off
Off
Off During lock protection operation (*2)
- - - Off Off - During thermal protection circuit operation *1: An FG signal at a frequency corresponding to the phase switching operation is output.
This IC is pin compatible with the LB11963T, which provides a built-in function for dividing the FG output frequency by 2 to handle 8-pole motors.
*2: In restart mode (output on) when a rotor constrained state was detected, the FG output operates in the same way as during normal operation, and differs depending on the rotor position.
Pin Assignment
IN+ 1 IN- 2 OUT1 3 GND 4
LB11964FA
8 VCC 7 CT 6 FG 5 OUT2
Application Circuit Example
(Top view)
*1 CR *2
VCC
*3
FG
H *4 ININ+
OUT1 OUT2
CT
GND
Circuit board mounted components
*1: The diode Di prevents destruction of the IC if the power supply is connected with reverse polarity. Since this IC includes a regeneration circuit, this IC recovers the coil current in the low side pnp output transistors and suppresses kickback, even when the diode Di is used. This diode may be omitted if there is no chance of reverse connection problems occurring, for example, if a power supply connector is used.
*2: This capacitor is required for rectification if power supply PWM is used for speed control. *3: This pin must be left open if unused. *4: Although chattering prevention measures, such as adopting a non-interfering pin assignment and providing
hysteresis in the Hall sensor amplifier, these lines must be made as short as possible to make the circuit more resistant to noise.
No.A2077-3/5
Block Diagram
0.22 to 1μF
Charge/Discharge circuit
LB11964F.