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Delphi Quad Channel Differential Controller

The Delphi Quad Channel Differential Controller (QCDC) is a 4-channel, non-inverting IGBT driver for electronic ignition controls. It has four differential inputs that are driven by a PCM to control ignition timing. This IC also provides current limit protection by sensing coil primary current through an external resistor. Should the coil primary current exceed a preset value, a masking time will occur on the EST input for noise immunity and IC protection. The QCDC IC provides gate drive for four separate IGBTs and can sense current on two separate coils.

Features

Current limit (adjustable with trim and external resistor)
Differential input (can sense input referenced from a separate ground)
EST (dwell) masking time for protection and noise immunity
Input hysteresis for noise immunity

Packaging

Bare IC with solder bumps for flip chip mounting

Typical Applications

Automotive ignition systems

Recommended Operating Conditions
Characteristic	Symbol	Value	Unit
Supply Voltage (w/external 120 ohm resistor)	B+	4.5 to 26.5	V
Operating Temperature		-40 to 140	°C

Absolute Maximum Ratings
Characteristic	Symbol	Value	Unit
Supply Voltage (w/external 120 ohm resistor)	B+	40 (Load Dump)	V
Junction Temperature		165	°C

Electrical Performance Characteristics
Characteristics	Symbol	Condition	Min	Max	Unit
EST Input On Threshold	VTon	4.5V < B+ < 26.5V	1.7	2.65	V
EST Input Off Threshold	VToff	4.5V < B+ <26.5V	1.3	1.9	V
EST Input Hysteresis	Hysteresis	4.5V < B+ <26.5V	.25		V
EST Input Current (High)	lih	Vest = 4V 4.5V < B+ < 26.5V	363	500	uA
EST Input Current (Low)	lil	Vest = .4V 4.5V < B+ < 26.5V	-125	70	uA
GD Output Voltage (High)	Voh	B+ = 4.5V	3	4.5	V
GD Output Voltage (High)	Voh	9V < B+ < 26.5V	6.75	9	V
GD Output Voltage (Low)	Vol	4.5V < B+ < 26.5V Igd = 15mA	0	.6	V
Over-voltage Shutdown	Vovs		26.5	32	V
VS Supply Current	Ivs	B+ = 4.5V		13	mA
VS Supply Current	Ivs	B+ = 26.5V		15	mA
Current Limit (sensed from external 30 milliohm resistor)	Vsense	4.5V < B+ < 26.5V -40°C	228	246	mV
Current Limit (sensed from external 30 milliohm resistor)	Vsense	B+ = 4.5V 25°C	228	250	mV
Current Limit (sensed from external 30 milliohm resistor)	Vsense	B+ = 4.5V 150°C	228	250	mV
Current Limit (sensed from external 30 milliohm resistor)	Vsense	14V < B+ < 26.5V 25°C	228	252	mV
Current Limit (sensed from external 30 milliohm resistor)	Vsense	14V < B+ < 26.5V 150°C	228	250	mV
Operating Logic Levels	Vil	4.5V < B+ < 26.5V	0	1.3	V
Operating Logic Levels	Vih	4.5V < B+ < 26.5V	2.65	5.5	V
Input Masking Time	Tmask		200	1000	uS

Delphi Quad Channel Differential Controller (44k)