Preliminary PT2434 3-Phase Sensorless BLDC Motor Controller DESCRIPTION FEATURES The PT2434 is a three-phase, sensor-less, brushless DC motor control chip. System operating voltage depends on the VM (motor voltage), from 12V to 400Vdc. On-chip LDO can provide 5V voltage for logic and analog circuits operation. The three-phase sensor-less control is based on trapezoid wave, and additional soft-switching scheme is design for reducing electrical audible noise when motor phase commutation. Combine with an external high voltage gate driver and six n-channel MOSFETs, PT2434 can operate high voltage motor up to 400V. On the 12V ~ 36V operation, it is easy to setup with simple level-shift circuit and combined with external PN MOSFETs. The PT2434 offers external parameters setting for optimum adjustment with different motors or applications. The package of PT2434 is SSOP28. Sensor-less control for 3-phase BLDC Current limit function Over temperature protection from external NTC Motor lock protection Reverse function. PWM or DC input for speed control FG output for rotation speed RD output for look detection APPLICATIONS Three-phase BLDC motor Three-phase BLDC fan, blower Three-phase BLDC ceiling fan BLOCK DIAGRAM V5V V15V OSC_C +5V LDO OSC1 OSC2 PWM Gen. SGND SGND RD/FG ZCO FWR DCPWM SW0/SW1 SW2/SW3 FLT COMI UH UL VH VL WH WL Sensorless Cotroller ZCD CT OCP ZCW ZCV ZCU CT RF OTP RSEN Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT2434 PIN CONFIGURATION FG 28 RD 27 SW1 DCPWM 26 4 FWR OSC_C U1 25 5 WL FLT 24 6 VL COMI 23 SW3 22 1 CT 2 SW0 3 X1 PTC Gate Driver PT2434 7 UL 8 WH ZCW 21 9 VH ZCV 20 10 UH ZCU 19 11 SGND SGND 18 12 V15V RF 17 13 V5V RSEN 16 14 SW2 ZCO 15 V5V +15V PRE1.0 2 September 2014 PT2434 PIN DESCRIPTION PRE1.0 Pin Name I/O/P Description CT O Connect to external capacitor for setting lock & lease time 1 SW0 SW1 I I Dead-time parameter setting. Refer to ELECTRIC CHARACTERISTIC, floating for HIGH 2 3 FWR I WL O Forward & reverse rotation setting. LOW for CCW, and HIGH (or floating ) for CW W phase low side signal output VL UL WH VH UH SGND V15V O O O O O P P V phase low side signal output U phase low side signal output W phase high side signal output V phase high side signal output U phase high side signal output Signal ground +15V supply input 6 7 8 9 10 11 12 V5V O 13 SW2 I ZCO O RSEN O RF SGND ZCU ZCV I P I I +5V LDO output PWM type setting. LOW for soft-switching, and HIGH (or floating) for normal trapezoid-wave. ZC comparator output for signal monitoring Connect to external resistors for over temperature sensing Current limit voltage sensing Signal ground U phase zero crossing input V phase zero crossing input ZCW I 21 SW3 I COMI FLT OSC_C DCPWM O I I I RD O FG O W phase zero crossing input Startup alignment strength setting. LOW for normal alignment, and HIGH (or floating) for light alignment Motor virtual neutral voltage Zero crossing filter Connect to external capacitor for startup step setting DC or PWM input for speed control Motor lock indicator, OPEN DRAIN structure, HIGH for abnormal event. Motor rotation speed indicator, OPEN DRAIN structure. Refer to FUNCTION DESCRIPTION 3 Pin No. 4 5 14 15 16 17 18 19 20 22 23 24 25 26 27 28 September 2014 PT2434 IMPORTANT NOTICE Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw PRE1.0 10 September 2014