Ordering number : EN6087B Monolithic Digital IC For Fan Motor LB1975 3-phase Brushless Motor Driver Overview The LB1975 is a 3-phase brushless motor driver IC suited for use in direct PWM driving of DC fan motors for air conditioners, water heaters, and other similar equipment. Since a shunt regulator circuit is built in, single power supply operation sharing the same power supply for the motor is supported. Features Withstand voltage 46V, output current 2.5A Direct PWM drive output 3 built-in output top-side diodes Built-in current limiter Built-in FG output circuit Specifications Absolute Maximum Ratings at Ta = 25C Parameter Symbol Conditions Ratings Unit Supply voltage V max 7V CC V max 46 V M Output current I max 2.5 A O Maximum input current I max V pin 10 mA REG REG Allowable power dissipation Pd max1 Independent IC 3 W Pd max2 With infinite hear sink 20 W Operating temperature Topr -20 to +100 C Storage temperature Tstg -55 to +150 C Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard tostandard applicatio, intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for anyspecial applicatio (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer s products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer sproductsor equipment. D1708 MS / 21003AS (OT) / 52199RM (KI) No.6087-1/10 LB1975 Allowable Operating Ranges at Ta = 25C Parameter Symbol Conditions Ratings Unit Supply voltage range V 4.5 to 6.7 V CC V 20 to 42 V M Input current range I V pin 1 to 5 mA REG REG FG pin applied voltage V 0 to V V FG CC FG pin output current I 0 to 10 mA FG Electrical Characteristics at Ta = 25C, V = 5V, V = 30V CC M Ratings Parameter Symbol Conditions Unit min typ max Supply current I 10 14 18mA CC Output Block Output saturation voltage Vsat1(L) I = 1.0A, V(sink) 1.1 1.4V O O O Vsat1(H) I = 1.0A, V(source) 0.9 1.3V O O O Vsat1 I = 1.0A, V (sink) + V(source) 2.0 2.6V O O O O Vsat2(L) I = 2.0A, V(sink) 1.4 1.8V O O O Vsat2(H) I = 2.0A, V(source) 1.2 1.7V O O O Vsat2 I = 2.0A, V (sink) + V(source) 2.6 3.4V O O O O Output leak current ILeak(L) 100 A O ILeak(H) -100 A O Upper side diode forward voltage V1 I = 1.0A 1.2 1.6 V FH O V2 I = 2.0A 2.1 2.6 V FH O Hall Amplifier Input bias current I -4 -1 A HB Common-mode input voltage range V 1.5 V -1.5 V ICM CC Hall input sensitivity VH 60 mVp-p IN Hysteresis width V(HA) 23 32 39 mV IN Input voltage (low to high) V 6 16 25mV SLH Input voltage (high to low) V -25 -16 -6mV SHL FG Pin (speed pulse output) Output low-level voltage V I = 5mA 0.5 V FGL FG Pull-up resistor value R 7.5 10 12.5k FG Current Limiter Limiter V 0.45 0.50 0.55V RF Thermal Shutdown Thermal shutdown operating TSD Design target Value (junction temperature) 150 180 C temperature Hysteresis width TSD Design target Value (junction temperature) 40 C Low-Voltage Protection Operating voltage V 3.5 3.8 4.1 V LVSD Non-operating voltage V (OFF) 4.3 4.5 V LVSD Hysteresis width V 0.4 0.5 0.6 V LVSD PWM Oscillator Output high-level voltage V (OSC) 2.95 3.10 3.25 V OH Output low-level voltage V(OSC) 1.38 1.45 1.59 V OL Amplitude V 1.50 1.65 1.71Vp-p OSC Oscillator frequency f C = 2200pF 19.6 23.0 27.6 kHz OSC Charge current I -110 -94 -83 A CHG Discharge resistance R 1.6 2.1 2.6 k DCHG V Pin REG Pin voltage V I = 1.5mA 6.6 7.0 7.2 V REG REG Continued on next page. No.6087-2/10