H-bridge drive utilizing a pair of high and low side MOSFETs in a common insulation housing
First Claim
Patent Images
1. An H-bridge driver for driving an electrical load;
- said H-bridge driver comprising first and second high side MOSFETs and first and second low side MOSFETs;
each of said MOSFETs having respective drain, source and control electrodes;
the drain electrodes of said high side MOSFETs and the source electrodes of said low side MOSFETs connected to power input terminals;
the source electrodes of said first and second high side MOSFETs connected to the drain electrodes of said first and second low side MOSFETs respectively at first and second nodes which define output bridge terminals;
a control IC for controlling the operation of said high side and low side MOSFETs;
said control IC having input terminals connectable to receive input control signals from an exterior bridge control circuit and having output terminals connected to said control electrodes of said high side MOSFETs;
a support for supporting said first and second high side MOSFETs and said control IC; and
a common insulation housing enclosing said first and second high side MOSFETs and said IC;
said first and second high side MOSFETs comprising intelligent power switches having output terminals communicating signals related to at least one of a switch current and to a MOSFET die temperature;
said output terminals of at least one of intelligent power switch communicating an output signal for said at least said control IC to shut down said H-bridge when one of the switch current and the MOSFET die temperature exceed a threshold value.
2 Assignments
0 Petitions
Accused Products
Abstract
A fully protected H-bridge for a d-c motor consists of two high side MOSFETs and a control and logic IC on a first conductive heat sink all within a first package and two discrete low side MOSFETs. The entire bridge is controlled by the IC. Shoot thru protection is provided for each leg, and a PMW soft start sequence is provided through the control of the low side MOSFETs, programed by an external, chargeable RC circuit. Input signals to the high side MOSFETs select the operation modes. Protective circuits are provided for short circuit current and over current conditions. Sleep mode and braking/non braking control is also provided.
868 Citations
18 Claims
-
1. An H-bridge driver for driving an electrical load;
- said H-bridge driver comprising first and second high side MOSFETs and first and second low side MOSFETs;
each of said MOSFETs having respective drain, source and control electrodes;
the drain electrodes of said high side MOSFETs and the source electrodes of said low side MOSFETs connected to power input terminals;
the source electrodes of said first and second high side MOSFETs connected to the drain electrodes of said first and second low side MOSFETs respectively at first and second nodes which define output bridge terminals;
a control IC for controlling the operation of said high side and low side MOSFETs;
said control IC having input terminals connectable to receive input control signals from an exterior bridge control circuit and having output terminals connected to said control electrodes of said high side MOSFETs;
a support for supporting said first and second high side MOSFETs and said control IC; and
a common insulation housing enclosing said first and second high side MOSFETs and said IC;
said first and second high side MOSFETs comprising intelligent power switches having output terminals communicating signals related to at least one of a switch current and to a MOSFET die temperature;
said output terminals of at least one of intelligent power switch communicating an output signal for said at least said control IC to shut down said H-bridge when one of the switch current and the MOSFET die temperature exceed a threshold value.
- said H-bridge driver comprising first and second high side MOSFETs and first and second low side MOSFETs;
-
2. An H-bridge driver for driving an electrical load;
- said H-bridge driver comprising first and second high side MOSFETs and first and second low side MOSFETs;
each of said MOSFETs having respective drain, source and control electrodes;
the drain electrodes of said high side MOSFETs and the source electrodes of said low side MOSFETs connected to power input terminals;
the source electrodes of said first and second high side MOSFETs connected to the drain electrodes of said first and second low side MOSFETs respectively at first and second nodes which define output bridge terminals;
a control IC for controlling the operation of said high side and low side MOSFETs;
said control IC having input terminals connectable to receive input control signals from an exterior bridge control circuit and having output terminals connected to said control electrodes of said high side MOSFETs;
a support for supporting said first and second high side MOSFETs and said control IC; and
a common insulation housing enclosing said first and second high side MOSFETs and said control IC; and
connection pins extending from said housing;
said connection pins including N1 and N2 pins coupled to the respective control electrodes of said first and second high side MOSFETs, a Vcc pin and a GND pin connected to said power input terminals, and M1 and M2 pins connected to said first and second nodes respectively. - View Dependent Claims (3, 4, 5)
- said H-bridge driver comprising first and second high side MOSFETs and first and second low side MOSFETs;
-
6. An H-bridge driver for driving an electrical load;
- said H-bridge driver comprising first and second high side MOSFETs and first and second low side MOSFETs;
each of said MOSFETs having respective drain, source and control electrodes;
the drain K electrodes of said high side MOSFETs and the source electrodes of said low side MOSFETs connected to power input terminals;
the source electrodes of said first and second high side MOSFETs connected to the drain electrodes of said first and second low side MOSFETs respectively at first and second nodes which define output bridge terminals;
a control IC for controlling the operation of said high side and low side MOSFETs;
said control IC having input terminals connectable to receive input control signals from an exterior bridge control circuit and having output terminals connected to said control electrodes of said high side MOSFETs;
a support for supporting said first and second high side MOSFETs and said control IC; and
a common insulation housing enclosing said first and second high side MOSFETs and said control IC;
said low side MOSFETs both being normally ON. - View Dependent Claims (7)
- said H-bridge driver comprising first and second high side MOSFETs and first and second low side MOSFETs;
-
8. An H-bridge driver for driving an electrical load;
- said H-bridge driver comprising first and second high side MOSFETs and first and second low side MOSFETs;
each of said MOSFETs having respective drain, source and control electrodes;
the drain electrodes of said high side MOSFETs and the source electrodes of said low side MOSFETs connected to power input terminals;
the source electrodes of said first and second high side MOSFETs connected to the drain electrodes of said first and second low side MOSFETs respectively at first and second nodes which define output bridge terminals;
a control IC for controlling the operation of said high side and low side MOSFETs;
said control IC having input terminals connectable to receive input control signals from an exterior bridge control circuit and having output terminals connected to said control electrodes of said high side MOSFETs;
a support for supporting said first and second high side MOSFETs and said control IC; and
a common insulation housing enclosing said first and second high side MOSFETs and said control IC;
said IC including a PWM generator for applying a soft start PWM signal to said control electrodes of said low side MOSFETs. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- said H-bridge driver comprising first and second high side MOSFETs and first and second low side MOSFETs;
Specification