SA5778 Datasheet, PDF (3/16 Pages) NXP Semiconductors – Serial triple gauge driver STGD

Philips Semiconductors
Serial triple gauge driver (STGD)
Product specification
SA5778
ORDERING INFORMATION
DESCRIPTION
28-Pin Small Outline (SO) thermally enhanced Package
TEMPERATURE RANGE
–40 to +105°C
ORDER CODE
SA5778D
DWG #
SOT136-1
PIN DESCRIPTION
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Mnemonic PinNo. Type
Name and Function
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^GND
6,7,8,9,20, I Circuit Ground Potential. The pins are used for heat dissipation to board. All pins should be soldered
21,22,&23
to foil on the board per the thermal management description.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _VBATT
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _GOE
10
I Battery supply voltage
3
I Gauge Output Enable: A high on this input enables normal operation of the gauge coil drivers.
See Table 1.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _RUN
2
I RUN (Ignition): Input to sense the state of the Ignition switch. See Table 1.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _SwCONTROL
4
O Switched Battery Control: Control output to switch on a protected V_BATT supply via an external PNP
transistor. This output is controlled by the RUN input, GOE input and the on chip protection circuits.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ SwBATT1
5,
I Switched Battery Supplies: Used as the reference level for the DACs, bias voltage for the second coils
SwBATT2
11
I of the minor gauges, and the supply for the output buffers for the major and minor gauges. One supplies
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{the major gauge drivers and related circuits, while the other supplies the minor gauge circuits. Both}
SwBATT inputs must be connected to the control transistor as the two inputs are not connected internally.
ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _SCLK
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _DATAIN
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _DATAOUT
24
I Serial Clock: Used to clock data into and out of the STGD. Data is shifted MSB first.
18
I Data In: Data is loaded on the rising edge of S_CLK and is shifted in MSB first.
12
O Data Out: Is provided to permit the STGD to pass status information back to the controlling
microcontroller, and to allow multiple devices to be connected in series.
ST
25
O Status Output: This is an open drain output. Status outputs from several devices may be wire OR’ed
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{together. This output is low when the outputs are disabled due to a fault condition. The outputs may be}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ disabled due to shorted outputs, over temperature, power up reset, or the GOE control pin and this
condition is reflected on the ST pin. The outputs will also be disabled due to an over voltage condition,
ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{however this is not reported on the ST pin as over voltage should be a transient condition.}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ CS
19
I Chip Select: Active high chip select input. When CS is high, the part is enabled to receive data on the
DATA_in pin and output data on the DATA_out pin. A low to high transition of CS captures device status in
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{the shift register for output. A high to low transition of CS loads gauge data from the shift register into}
the data latches.
ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _SIN+
1
O Sine Positive: Driver output to sine coil of major gauge, positive side.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _SIN–
28
O Sine Negative: Driver output to sine coil of major gauge, negative side.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _COS+
27
O Cosine Positive: Driver output to cosine coil of major gauge, positive side.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _COS–
26
O Cosine Negative: Driver output to cosine coil of major gauge, negative side.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _C1+
16
O Coil 1 Positive: Driver output to driven coil of minor gauge 1, positive side.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ C1–
17
O Coil 1 Negative: Driver output to driven coil of minor gauge 1, negative side.
C2+
15
O Coil 2 Positive: Driver output to driven coil of minor gauge 2, positive side.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _C2–
14
O Coil 2 Negative: Driver output to driven coil of minor gauge 2, negative side.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _COM
13
O Common: Driver output for junction of bias coils for minor gauges. This output is regulated to half of
SwBATT.
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _{ABSOLUTE MAXIMUM RATINGS}
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _SYMBOL
PARAMETER
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _VBATT
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _VIN1
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _VIN2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ V_IN3
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ^PD
T_amb
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _TJ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _θJA
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ _NOTE:
Battery supply voltage, with recommended 1KW series resistor
Input voltage; Data In, CS, SCLK, GOE
Input voltage; Sw_BATT
Input voltage; RUN, with recommended RC Circuit
Power Dissipation (T_amb = 105°C) SO-28 Package
Ambient operating temperature
Junction temperature¹
Thermal Impedance
RATING
40
–1 to +7
–1 to +24
–1 to +40
1400
–40 to +105
+150/+160
See Thermal Management Section
UNIT
V
V
V
V
mw
°C
°C
°C/W
1. 160°C junction temperature is permitted during high battery (>16V) fault operation
1998 Apr 03
3