CA3292A Intersil, CA3292A Datasheet - Page 4

• Manufacturer Part Number: CA3292A
• Description: Quad-Gated Inverting Power Drivers with Fault Mode Diagnostic Flag Output
• Manufacturer: Intersil

Electrical Specifications
Output Driver Fault Sense, Low Threshold
(Short)
PROTECTION PARAMETERS
Over-Current Limiting
Over-Temperature Limiting
(Junction Temperature)
Over-Temperature Limiting, Hysteresis
DESIGN PARAMETERS
Input Capacitance
Enable Capacitance
NOTES:
1. Output Transient Currents are controlled by on-chip limiting for each output. Under short-circuit conditions with voltage applied to the
2. The total DC current with all 4 outputs ON should not exceed the total of (4 x 0.7A + Max. I
4. I
5. The I
6. The Voltages, V
7. Tested with 120mA switched off in a Load of 70mH and 32 series resistance;
8. The single pulse clamp energy rating for the CA3292A is defined over a range of operating conditions. The Clamp Energy is a function
3. The PLCC and SOIC packages have power lead frame construction through the ground pins to conduct heat from the frame to the PC
collector of the output transistor and with the output transistor turned ON, the current will increase to 1.2A, typical. Over-Current Limiting
protects a short circuit condition for a normal operating range of output supply voltage. During a short circuit condition, the output driver
will shortly thereafter (approximately 5ms) go into Over-Temperature Shutdown. While Over-Current Limiting may range to peak cur-
rents as high as 1.6A, each output will typically withstand a direct short circuit at normal single battery supply levels. Excessive dissi-
pation before thermal shutdown occurs may cause damage to the chip for supply voltages greater than 16V. When sequentially
switched, the outputs are rated to withstand peak current, cold turn-on conditions of lamp loads such as #168 or #194 lamps.
icantly increase the chip temperature due to increased dissipation and may cause thermal shutdown in high ambient temperature con-
ditions (See Absolute Maximum Ratings for Dissipation). Any one output may be allowed to exceed 0.7A but may be subject to Over-
Current Limiting above the I
the I
Board ground area. Thermal resistance,
copper PC board with minimal ground area and with a 2 square inches of ground area.
stage. The value of I
sink is to detect open load conditions.
I
leakage current, I
LOGIC TABLE for Fault Modes.
transitions for voltage forced at the outputs. V
V
pin indicates a Low (Fault). Refer to Figure 2 for test value of external resistor. Refer to I
to determine V
CA3272A: Outputs clamped with an external Zener diode, limiting V
CA3292A: Outputs limited to the V
of the Load Inductance, Load Resistance, Clamp Voltage, Supply Voltage, the Saturated ON Resistance (V
Load Current at the instant of Turn-OFF. Refer to Figure 5 for the Safe Operating Area when driving inductive loads. Rating limits for
Energy vs Single Pulse Width Time are plotted for different coil values. Refer to Application Note - AN9416 for pulse energy calculation
methods.
CEX
F(SINK)
LTHD
LIM
OL
is the static leakage current at each output when that output is OFF (ENABLE Low). Refer to the Figure 3 illustration of an output
indicates a shorted load when the output is increased greater than the threshold. The output voltage is changed until the FAULT
. The current sink is active only when a fault exists. When no fault exists, the I
value of “Output Low Current, I
minimum limit of 0.7A. As a practical limit, no single output should be loaded to more than 1A maximum.
PARAMETER
OL
HTHD
F(LK)
and V
CEX
, V
. Refer to Figure 2 for an illustration of the FAULT output and associated external components. Refer to FAULT
OH
LTHD
is both the leakage into the output driver and a pull-down current sink, I
at the FAULT pin.
LIM
are the comparator threshold reference values (Min. and Max. Range) sensed as a high and low state
T
A
minimum limit of 0.7A. No single output should be loaded to more than Over-Current Limiting above
= -40
CLAMP
o
F(SINK)
C to 125
SYMBOL
JA
V
T
T
C
voltage by the internal collector-to-base Zener diode and output transistor clamp.
I
C
LTHD
LIM
HYS
LIM
is given for a surface mount of the 28 lead PLCC and the 28 lead SOIC packages on a 1 oz.
EN
IN
HTHD
” at the FAULT pin is both the static leakage of the output driver Q
CA3272A, CA3292A
o
C, V
indicates an open load fault when the output is decreased to less than the threshold.
V
V
CC
IN
IN
= V
= V
= 5.5V, Unless Otherwise Specified (Continued)
EN
EN
TEST CONDITIONS
= 2V (Note 6)
= 2V, V
4
OUT
OUT
to the V
= 4 to 16V
CE(SUS)
OL
OH
CC
and I
maximum rating of +40V.
current at the FAULT pin is the maximum
)
~
OH
2.85A. This level of current will signif-
MIN
0.7
O(SINK)
3
-
-
-
-
FAULT PARAMETERS Test Limits
. The purpose of the current
TYP
165
4.6
SAT
15
4
3
-
F
) and the Steady State
and the current sink,
Note 1
MAX
5.5
-
-
-
-
UNITS
o
pF
pF
V
A
o
C
C