LB11967V Single-Phase Full-Wave Pre

Download LB11967V Single-Phase Full-Wave Pre .PDF

7782402 Downloads

1.14 MB .pdf

<VLIM pin> This pin activates the current limiter when the SENSE pin voltage is higher than the VLIM pin voltage and is connected to 6VREG when not used. A listing of ON Semiconductor’s product/patent coverage may be accessed at www. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. (Note4) Ratings Parameter Symbol Conditions Unit min Circuit current ICC1 ICC2 6VREG voltage HB voltage VOVER voltage 6VREG VHB VVOVER During drive During lock protection typ 6 max 10 14 mA mA 6 10 14 I6VREG = 5mA 5. (2) LowHigh speed mode PWM control is made through comparison of oscillation and VTH voltages with CPWM changing between 1. 65 NOTE: The measurements are not to guarantee but for reference only. com 2 LB11967V Package Dimensions unit : mm SSOP20 (225mil) CASE 565AN ISSUE A SOLDERING FOOTPRINT* 5. When the VTH voltage is higher, the p-channel FET is turned off and coil current is regenerated through the low-side FET. ) (4) PWM-IN input disconnection mode When the PWM-IN input pin is disconnected, VTH becomes 1. (VTH must be equal to GND when the speed control is not to be made. com 3 LB11967V Pd max Ta Allowable power dissipation, Pd max mW 1000 Mounted on specified board: 114. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. Functions • Pre-driver for single-phase full-wave drive PNP-EMOS is used as an external power Transistor, enabling high-efficiency low-consumption drive by means of the low-saturation output and single-phase full-wave drive. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. (3) Full speed mode The full-speed mode becomes effective with the VTH voltage of 1. <ROFF pin> This pin sets the soft switching time to cut the reactive current before phase change and is connected to 6VREG when not used. When the VTH voltage is lower, the IC switches to drive mode. This device is optimal for driving large scale fan motors (with large air volume and large current) such as those used in servers and consumer products. (PMOS-NMOS also applicable) • External PWM input enabling variable speed control Separately-excited upper direct PWM (f = 25kHz) control method, enabling highly silent speed control • Compatible with 12V, 24V, and 48V power supplies • Current limiter circuit incorporated Chopper type current limit at start • Reactive current cut circuit incorporated Reactive current before phase change is cut to enable silent and low-consumption drive. • Minimum speed setting pin Minimum speed can be set with external resistor