LB11850VA Singlephase Fullwave Predriver with Speed Control Function for Fan Motor www.onsemi.com Monolithic Digital IC Overview The LB11850VA is a single-phase bipolar fan motor driver with speed control function that works with a speed feedback signal. A highly efficient, quiet and low power consumption motor driver circuit, with a high speed accuracy and large variable speed can be implemented by adding a small number of external components. SSOP24 This pre-driver is optimal for driving large scale fan motors (with CASE 565AR large air volume and large current) such as those used in servers and consumer products. MARKING DIAGRAM Functions and Features Pre-driver for Single-phase Full-wave Drive XXXXXXXXXX PMOS-NMOS is Used as an External Power TR, Enabling YMDDD High-efficiency and Low-power-consumption Drive by Means of the Low-saturation Output and Single-phase Full-wave Drive On-chip Speed Control Circuit The Speed Control (Closed Loop Control) Using a Speed XXXXX = Specific Device Code Feedback Signal Makes it Possible to Achieve Higher Speed Y = Year Accuracy and Lower Speed Fluctuations when Supply Voltage M = Month Fluctuates or Load Fluctuates, Compared with an Open-loop DDD = Additional Traceability Data Control System. Separately Excited Upper Direct PWM Control Method is Used as the Variable-speed Control System PIN ASSIGNMENT External PWM Input or Analog Voltage Input Enabling Variable 1 24 Speed Control OUT2P OUT1P The Speed Control Input Signal is Compatible with PWM Duty OUT1N OUT2N Ratio or Analog Voltages V SGND CC On-chip Soft Start Circuit 5VREG SENSE Lowest Speed Setting Pin CVI C The Lowest Speed can be Set with the External Resistor EO CVO Current Limiter Circuit Incorporated Chopper Type Current Limit at Start or Lock CTL EI Reactive Current Cut Circuit Incorporated RC LIM Reactive Current before Phase Change is Cut to Enable Silent and CT SOFT Low-consumption Drive CPWM IN+ Constraint Protection and Automatic Reset Functions Incorporated HB FG FG (Speed Detection), RD (Lock Detection) Output RD IN Constant-voltage Output Pin for Hall Bias 12 13 (Top View) ORDERING INFORMATION See detailed ordering and shipping information on page 14 of this data sheet. Semiconductor Components Industries, LLC, 2013 1 Publication Order Number: March, 2018 Rev. 1 LB11850VA/DLB11850VA SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS (T = 25C) A Symbol Parameter Conditions Ratings Unit V max V Maximum Supply Voltage 18 V CC CC I N max OUTN Pin Maximum Output Current 20 mA OUT I P max OUTP Pin Maximum Sink Current 20 mA OUT V max OUT Pin Output Withstand Voltage 18 V OUT HB HB Maximum Output Current 10 mA CTL, C max CTL, C Pin Withstand Voltage 7 V CVI, LIM max CVI, LIM Pin Withstand Voltage 7 V FG max RD/FD Output Pin Output Withstand 19 V Voltage RD/FG Output Current 10 mA I5VREG max 5VREG Pin Maximum Output Current 10 mA P max Allowable Power Dissipation Mounted on a specified board (Notes 1, 2) 0.9 W d T Operating Temperature Range 30 to +95 C opr T Storage Temperature Range 55 to +150 C stg Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 1. Mounted on a specified board: 114.3 mm 76.1 mm 1.6 mm, glass epoxy. 2. T max = 150 C. Use the device in a condition that the chip temperature does not exceed T = 150 C during operation. j j RECOMMENDED OPERATING RANGES (T = 25C) A Symbol Parameter Conditions Ratings Unit V 1 V Supply Voltage 1 V pin 5.5 to 16 V CC CC CC V 2 V Supply Voltage 2 When V 5VREG shorted 4.5 to 5.5 V CC CC CC VCTL CTL Input Voltage Range 0 to 5VREG V VLIM LIM Input Voltage Range 0 to 5VREG V VCVI VCI Input Voltage Range 0 to 5VREG V VICM Hall Input Common Phase Input Voltage 0.2 to 3 V Range Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. ELECTRICAL CHARACTERISTICS (T = 25C, V = 12 V, unless otherwise specified) A CC Symbol Parameter Conditions Min Typ Max Unit I 1 Circuit Current During drive 12 15 mA CC I 2 During lock protection 12 15 mA CC 5VREG 5VREG Voltage I5VREG = 5 mA 4.8 5.0 5.2 V VHB HB Voltage IHB = 5 mA 1.05 1.20 1.35 V VLIM Current Limiter Voltage 190 210 230 mV VCRH CPWM Pin H Level Voltage 2.8 3.0 3.2 V VCRL CPWM Pin L level Voltage 0.9 1.1 1.3 V ICPWM1 CPWM Pin Charge Current VCPWM = 0.5 V 24 30 36 A ICPWM2 CPWM Pin Discharge Current VCPWM = 3.5 V 21 27 33 A FPWM CPWM Oscillation Frequency C = 220 pF 30 kHz www.onsemi.com 2