Features: ·Built-in charge pump for gate overdrive of high side drive applications
· Lossless protection of the power MOSFET
· Programmable MOSFET protection voltage
· Programmable delay of protection latch-OFF
· Fast turn-ON (1.5 ms max with gate capacitance of 25000 pF)
· Undervoltage shut OFF with VCC k 7V
· Overvoltage shut OFF with VCC l 26V
· Withstands 60V supply transients
· CMOS logic compatible ON/OFF control input
· Surface mount and dual in-line packages availableSpecifications
| Drivers |
1 |
| Temperature Min |
-40 deg C |
| Temperature Max |
125 deg C |
| PowerWise |
No |
| View Using Catalog |
Supply Voltage ......................................................60V
Reverse Supply Current ....................................20 mA
Output Voltage ...........................................VCC a 15V
Voltage at Sense and Threshold
(through 1 k) ........................................-25V to +60V
ON/OFF Input Voltage ..................-0.3V to VCC+ 0.3V
Junction Temperature ........................................150
Storage Temperature .........................-55 to 150
Lead Temperature (Soldering, 10 seconds) .......260
DescriptionThe LM9061 is a charge-pump device which provides the gate drive to any size external power MOSFET configured as a high side driver or switch. A CMOS logic compatible ON/OFF input controls the output gate drive voltage. In the ON state, the charge pump voltage, which is well above the available VCC supply, is directly applied to the gate of the MOSFET. A built-in 15V zener clamps the maximum gate to source voltage of the MOSFET. When commanded OFF a 110 µA current sink discharges the gate capacitances of the MOSFET for a gradual turn-OFF characteristic to minimize the duration of inductive load transient voltages and further protect the power MOSFET.
Lossless protection of the power MOSFET is a key feature of the LM9061. The voltage drop (VDS) across the power device is continually monitored and compared against an externally programmable threshold voltage. A small current sensing resistor in series with the load, which causes a loss of available energy, is not required for the protection circuitry. Should the VDS voltage, due to excessive load current, exceed the threshold voltage, the output is latched OFF in a more gradual fashion (through a 10 µA output current sink) after programmable delay time interval.
Designed for the automotive application environment the LM9061 has a wide operating temperature range of −40°C to +125°C, remains operational with VCC up to 26V, and can withstand 60V power supply transients. The LM9061 is available in an 8-pin small outline surface mount package.
LM9061 Data Sheet
