Document
Ordering number : ENN6189
LB1965M
Monolithic Digital IC
LB1965M
Two-Phase Unipolar Driver for Variable-Speed Fan Motor
Features
• With only a few peripheral parts including a thermistor, ambient temperature dependent continuous speed control can be implemented. This allows low-speed startup (100% duty drive at startup). • Settable minimum rotation speed for low temperature • Built-in thermistor voltage amplification circuit assures high precision of ambient temperature to rotation speed ratio • Built-in motor lockup protection and automatic recovery circuit Output current Io = 1.5A, built-in output stage protection Zener diode –> Low-noise protection with chip capacitors also possible • Built-in thermal protection • FG output • Direct Hall element connection possible
Package Dimensions
unit: mm 3111-MFP14S
0.625 1.8max
0.15
[LB1965M]
14 8
1 8.0
7
0.35
1.0 1.0
SANYO : MFP14S
Specifications
Absolute Maximum Ratings at Ta = 25˚C
Parameter Maximum input current Maximum applied output voltage Maximum output current Current flowing into FG FG applied voltage Allowable power dissipation Operating temperature Storage temperature Symbol Conditions ICC max t ≤ 20 ms VOUT max I out max IRD max VRD max Pd max Mounted on a specified PCB (114.3 × 76.1 × 1.5 mm3 glass epoxy) Topr Tstg Ratings 200 Internal 1.5 10 50 0.8 –30 to +85 –55 to +150 Unit mA V A mA V W °C °C
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
83100RM(KI) No. 6189-1/6
0.1 1.5
5.15 6.4
4.4
LB1965M
Allowable Operating Ranges at Ta = 25˚C
Parameter Input current range Hall amplifier common mode input voltage range RMI input voltage range Rth input voltage range Symbol ICC VICM VRMI VICM Conditions Ratings 6.0 to 50 0 to VIN–1.5 0.3 to VIN 0 to VIN–1 Unit mA V V V
Electrical Characteristics at Ta = 25˚C, ICC = 10 mA
Parameter Output limiter voltage Output saturation voltage Input voltage Amplifier input offset voltage Amplifier input bias current FG output saturation voltage C charge voltage C discharge voltage Comp input threshold voltage Ct discharge voltage Rt input current VRt amplification RMI offset voltage Thermal protection operating voltage Symbol VoLM1 Vosat1 Vosat2 Vosat3 VIN VOFF IBA VFG(sat) IC1 IC2 VTH1 VTH2 VCT Irt VRt VRMIoff TSD Io = 0.1A Io = 0.5A Io = 1.0A Io = 1.5A Icc = 7.0 mA Conditions Ratings min 30 typ 32 0.95 1.15 1.4 6.7 0 max 34 1.2 1.5 2.0 7.0 7.0 0.3 5.0 0.65 0.83 0.48 0.24 3 1.60 +7 210 Unit V V V V V mV nA V µA µA V V V µA times mA ˚C
6.4 –7.0 –250
IFG = 5 mA C = GND C = VIN
VRT = GND RT = OPEN Design target value*
0.15 2.7 3.9 0.35 0.50 0.77 0.8VIN 0.42 0.45VIN 0.20 0.22VIN 1 1.52 1.56 –7 0 150 180
* Design target values are not measured.
Pin Assignment
Pd max – Ta
1000
Allowable power dissipation, Pd max – mW
800
Specified substrate (114.3 × 76.1 × 1.5 mm3) glass epoxy
14
13
12
11
10
9
8
OUT2 B1
6
FG
VIN
400
416
LB1965M
OUT1 IN+ IN– NC CR GND
7
200
1
0 –30 0 30 60 85 90 120
2
3
4
RMI
Rth
Ct
5
B2
(Top View)
No. 6189-2/6
600
Ambient temperature, Ta – °C
LB1965M
Truth Table
IN+ H L H L – – IN– L H L H – – Ct H H H H L – Rt L L H H H – RMI H H L L H – CR L L L L L H OUT1 H L H L H H OUT2 L H L H H H FG L H L H – – Mode Full speed Full speed Minimum speed Minimum speed Low speed Lockup protection
Sample Application Circuit
12V D1 R1 390
C3 R6 2k H VIN FG B1 OUT1 IN– IN+ Ct Rth RMI CR OUT2 B2 GND C4 C1 0.47 µ Noise absorption capacitor 0.01 to 0.047µF
R2 470k R4 18k R3 30k
R5 39k
TH 10k
C2 0.022 µ
Unit ( resistance: Ω, capacitance: F)
The above circuit is an example for ambient temperature based speed control using a thermistor. The thermistor voltage (Rth pin voltage) is multiplied internally by 1.6 and compared to the voltage at the Ct pin. With the above settings and at Ta = 25˚C, the Rth pin voltage is interrupted for the interval t off as defined by the equation below. At Ta = 45˚C, because the Rth pin voltage × 1.6 becomes less than Vct (=1.5V), there is no cut-off interval and the motor is driven with a duty ratio of 100%. At low temperatures, the thermistor voltage (Rth × 1.6) will rise, but minimum rotation speed is .