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PDF ATA6842 Data sheet ( Hoja de datos )
| Número de pieza | ATA6842 | |
| Descripción | Automotive Failsafe System IC | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Driver Stages
– Four DMOS 150 mA Low-side Relay Drivers with Current Limitation
– One Gate Driver for External N-channel FET with Charge Pump and Bootstrap
– Two Universal Outputs (10 mA High Side and 60 mA Low Side)
– One 20 mA Warning Lamp Driver
• Power Supplies
– 5V/150 mA Linear Regulator
– 5V/30 mA Linear Regulator (also Active in Standby Mode)
– Internal Power Supply
– Switchable System Supply Voltage Output
• Monitoring and Protection
– 12V Monitoring
– Watchdog with Reset
– Two Comparators for Current Measurement
– Adjustable Undervoltage Warning Level
– Overtemperature Protection with Hysteresis
– Two 5V Comparators
– Wide Supply Voltage Range from 5.8V up to 26V
– 8-bit SPI Interface
– Low Current Consumption in Standby Mode 80 µA
– TTL and CMOS Compatible Inputs
– 2 kV ESD Protection
– Transient Protection According to ISO/TR 7637-1 Level 4 (Except Load Dump)
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Automotive
Failsafe System
IC
ATA6842
Applications
As an Automotive Failsafe System IC, the ATA6842 is ideal for driver and monitoring
functions in ambitious solutions with increased safety requests such as parking
brakes, power steering, and other applications with DC motor control.
4964B–AUTO–07/07
1 page  
2. Pin Configuration
Figure 2-1. Pinning QFN48
C2I
OUTN
C1I
RD4
RD3
GNDP
RD2
RD1
V12S
V12
OUTP
WLN
24 23 22 21 20 19 18 17 16 15 14 13
25 12
26 11
27 10
28 9
29 8
30
31
ATA6842
7
6
32 5
33 4
34 3
35 2
36 1
37 38 39 40 41 42 43 44 45 46 47 48
CLK
CSN
RCOS
E5
EK15
UVM
TEST
UVR
GNDA
RREF
RESN
RSTN
ATA6842
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Table 2-1. Pin Description
Pin Symbol
1 RSTN
2 RESN
3 RREF
4 GNDA
5 UVR
6 TEST
7 UVM
8 EK15
9 E5
10 RCOS
11 CSN
12 CLK
13 DI
14 DO
15 VRE
16 C1O
17 GNDL
18 C2O
19 B1CO
20 B1CI
21 B1CG
Function
Reset input
Reset output
Reference resistor
Analog ground
Undervoltage reference input
Test
Undervoltage measurement input
Enable (K15 based)
Enable (5V based)
Resistor-capacitor oscillator
Chip-select input
Clock input
Data input
Data output
External voltage regulator output
Comparator 1 output
Logic ground
Comparator 2 output
Bridge 1 current output
Bridge 1 current input
Bridge 1 current ground
4964B–AUTO–07/07
5
5 Page 
ATA6842
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5. Electrical Characteristics (Continued)
Operating conditions: V12 = 6.5V to 26V, V5 = 5V ±3%, RREF = 10 kΩ ±2%, Tj = –40°C to 150°C, unless otherwise specified.
No. Parameters
Test Conditions
Pin
Symbol Min.
Typ.
Max. Unit Type*
6 Linear Regulator
6.1 Output voltage
6.2 Line regulation
I(V5) = –150 mA to 0 mA,
ß(NPN) > 120 mA,
Uce,sat(NPN) < 0.8V,
fT > 100 MHz
Ube(NPN) < 0.8V at –40°C,
Ube(NPN) < 0.7V at 27°C,
Ube(NPN) < 0.6V at 105°C
V12 = 8V to 18V,
I(V5) = –150 mA
V5 V5 4.85 5 5.15 V A
V5
V5lir
–10
+10 mV A
6.3 Load regulation
V12 = 14V,
I(V5) = –50 mA to –150 mA
V5
V5lor
–20
+20 mV A
6.4 Allowed capacitor
V5 CV5 7
22 µF C
6.5 Allowed capacitor
V5 ESR,CV5 0.5
10 Ω C
6.6
Lower threshold
undervoltage
RESN = low
V5 VtU(V5)low 4.5
VA
6.7
Upper threshold
undervoltage
RESN = high
V5
VtU(V5)hig
h
4.8 V A
6.8
Lower threshold
overvoltage
RESN = high
V5 VtO(V5)low 5.2
VA
6.9
Upper threshold
overvoltage
RESN = low
V5
VtO(V5)hig
h
5.5 V A
6.10
Hysteresis
Under/overvoltage
V5 Vt(V5)hys 50
200 mV A
6.11
Under/overvoltage
filter time
V5
tfi(V5)
8
30 µs A
6.12 Short circuit current V(B5) = 0V
B5
Isc(B5)
1.5
8 mA A
6.13 Pull-down resistor V(B5) = 1V
B5 Rpd(B5) 50
250 kΩ A
6.14 Pull-down current V(B5) = 6V
B5
Ipd(B5)
10
50 µA A
Vs(B5) = V12 – V(B5),
V12 = 5.8V to 6.5V,
6.15
Saturation voltage
high
I(B5) = –1.25 mA
Tj = –40°C
Tj = 27°C
Tj = 105°C
B5 Vs(B5)high
0.15 V A
0.25 V
0.35 V
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note:
1. Reduced operation mode means either
- RDSON of drivers could be higher than specified or
- Voltage at pin TCFET could be beyond specified limits
4964B–AUTO–07/07
11
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet ATA6842.PDF ] | |
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