ATA5275-PGQ ATMEL Corporation, ATA5275-PGQ Datasheet - Page 13

• Manufacturer Part Number: ATA5275-PGQ
• Description: 125 kHz Transmitter IC FOR TPM
• Manufacturer: ATMEL Corporation

7. Electrical Characteristics
8. External Components
The following external components have to be applied to the circuit for functional operation.
9. Application Hints
4739C–AUTO–02/05
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Notes:
Component
R
R
C
C
C
R
R
Notes:
No.
6.5
6.6
6.7
6.8
6.9
ext
CR
0
RF
B
S
DIO
1. 8 V < V(DVCC) < 24 V; -40 C <
2. Definition of DC
Parameters
Error signal pulse
width
Transmission time out
de-activated half-
bridge
Transmission time out
activated half-bridge
Time out reset pulse
width
Time out reset pulse
period
1. For EMC reasons only.
2. Sensitivity at input SENSE is proportional to resistor Rs times antenna peak current.
3. For antenna peak value 1.5 A.
4. Recommended range: R
A typical application of ATA5275 is shown in
antenna current can be estimated by the formula:
Here R
resistance in series with the shunt resistance and the internal drain-source-on-resistance of the
NDMOS. The duty cycle DC
of the oscillation period.
The phase difference
and the peak value of the antenna current.
DRV
Î
A
=
see
Test Conditions
2
-- -
A
“Application Hints” on page 13
CR
denotes the equivalent series resistance of the driver load, i.e., the external coil series
V
-----------------
= 25 to 100 k .
DVCC
R
A
amb
(1)
sin
< 105 C, unless otherwise specified; all values refer to GND
(Continued)
A
SENSE
-- -
2
BOOST
is measured as the time difference between the point of mass of VDRV
RCR
VCC
REXT
VCC
DIO
Pin
DRV
DC
(4)
(1)
Pin
(2)
DRV
is the ratio of the driver high-side on-time with respect to the half
Symbol
cos
T
T
T
T
T
OUTH
OUTL
ERR
ORP
0.1
OR
Min.
0.68
0.6
25
A
(3)
Figure 9-1 on page
Min.
ATA5275 [Preliminary]
Typ.
100
100
0.5
22
1
1
Typ.
128
16
16
32
15
Max.
14. The peak value of the
200
2
1
6
Max.
Unit
ms
ms
ms
µs
µs
Unit
µF
nF
nF
k
k
k
Type*
B
B
13