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IR3537 Datasheet(PDF) 3 Page - International Rectifier |
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IR3537 Datasheet(HTML) 3 Page - International Rectifier |
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3 / 15 page ![]() www.irf.com | © 2014 International Rectifier January 9, 2015 | V1.2 3 IR3537 CHL8510 12V High Performance Gate Driver FUNCTIONAL BLOCK DIAGRAM Figure 3: IR3537/CHL8510 Functional Block Diagram PIN DESCRIPTIONS PIN # PIN NAME PIN DESCRIPTION 1 BOOT Floating bootstrap supply pin for the upper gate drive. Connect a bootstrap capacitor between this pin and the SWITCH pin. The bootstrap capacitor provides the charge to turn on the upper MOSFET. See the Internal Bootstrap Device section under DESCRIPTION for guidance in choosing the capacitor value. 2 HVCC Connect this pin to VCC (+12V) or to a separate supply between 4.5V and 13.2V to provide a lower gate drive voltage on the high‐side MOSFETs. It is connected to the anode of the internal bootstrap diode. Place a high‐quality low ESR ceramic capacitor from this pin to GND. 3 PWM The PWM signal is the control input for the driver from a 1.8V or 3.3V PWM signal. The PWM signal can enter three distinct states during operation; see the three‐state PWM Input section under DESCRIPTION for further details. Connect this pin to the PWM output of the controller. 4 VCC Connect this pin to a +12V bias supply. Place a high quality low ESR ceramic capacitor from this pin to GND. 5 LVCC Connect this pin to VCC (+12V) or a separate supply voltage between 4.5V and 13.2V to vary the drive voltage on the low‐side MOSFETs. Place a high‐quality low ESR ceramic capacitor from this pin to GND. This pin must always be ≤ VCC+0.7Vdc. 6 LO_GATE Lower gate drive output. Connect to gate of the low‐side power N‐Channel MOSFET. 7 GND Bias and reference ground. All signals are referenced to this node. It is also the power ground return of the driver. 8 MODE This pin allows selection of the PWM signal voltage for 1.8V or 3.3V normal operation. Floating this pin configures the driver for IR Active Tri‐Level (ATL) using 1.8V PWM, and connecting this pin to ground configures the driver for generic active tri‐state operation using 3.3V PWM. 9 SWITCH Connect this pin to the SOURCE of the upper MOSFET and the DRAIN of the lower MOSFET. This pin provides a return path for the upper gate drive. 10 HI_GATE Upper gate drive output. Connect to gate of high‐side power N‐Channel MOSFET. PAD (11) GND Bias and reference ground. All signals are referenced to this node. It is also the power ground return of the driver. POR, reference and Control Shoot Through Control LVCC LO_GATE HI_GATE GND SWITCH PWM VCC BOOT MODE HVCC |
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