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DA7280 Datasheet(PDF) 40 Page - Renesas Technology Corp

Part # DA7280
Description  Wideband LRA/ERM Haptic Driver for Automotive Applications
PDF  80 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

DA7280 Datasheet(HTML) 40 Page - Renesas Technology Corp

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DA7280-Automotive
Wideband LRA/ERM Haptic Driver for Automotive
Applications
Datasheet
Revision 1.4
01-Mar-2022
CFR0011-120-00
40 of 79
© 2022 Renesas Electronics
For LOOP_FILT_RES_TRIM apply the settings in Table 15.
Table 15: LOOP_FILT_RES_TRIM Register Trim Settings
Lseries (µH)
Rseries
(Ω)
25 or
lower
50
75
100
125
150
175
200
225
250 or
higher
4
2
2
3
3
3
3
3
3
3
3
6
1
2
2
3
3
3
3
3
3
3
8
1
2
2
2
3
3
3
3
3
3
10
0
1
2
2
2
3
3
3
3
3
12
0
1
2
2
2
2
3
3
3
3
14
0
1
1
2
2
2
2
3
3
3
16
0
1
1
2
2
2
2
2
3
3
18
0
0
1
1
2
2
2
2
2
3
20
0
1
1
2
2
2
3
3
3
3
22
0
1
1
2
2
2
2
3
3
3
24
0
1
1
2
2
2
2
3
3
3
26
0
1
1
2
2
2
2
2
3
3
28
0
1
2
2
2
3
3
3
3
3
30
0
1
2
2
2
3
3
3
3
3
32
0
1
2
2
2
2
3
3
3
3
34
0
1
1
2
2
2
3
3
3
3
36 to 40
0
1
1
2
2
2
2
3
3
3
42
0
1
2
2
3
3
3
3
3
3
44
0
1
2
2
3
3
3
3
3
3
46 to 50
0
1
2
2
2
3
3
3
3
3
Set LOOP_FILT_LOW_BW high if the actuator inductance exceeds 1 mH.
5.7.10
UVLO Threshold
The DA7280-A UVLO has a default fall threshold of 2.8 V. This is adjustable in 100 mV steps via
REF_UVLO_THRES. The full range is 2.8 V to 3.0 V. The consumer grade version of the DA7280
has a range of 2.7V to 3.0V, with a default of 2.8V.
5.7.11
Edge Rate Control
DA7280-A contains an advanced switching node ERC to minimize EMI and board disturbances. The
slope of the ERC can be adjusted by changing the values of the HBRIDGE_ERC_LS_TRIM (for low-
side FET ERC) and HBRIDGE_ERC_HS_TRIM (for high-side FET ERC). Default value is 100 mVn/s
and the adjustable range is 25 mV/ns to 100 mV/ns in 25 mV/ns steps.
5.7.12
Double Output Current Range
The nominal current rating for the DA7280-A current regulation output is 250 mA. This range covers
existing LRAs, however some LRA manufacturers allow significant actuator overdrive over short
periods of time. DA7280-A supports this by enabling LOOP_IDAC_DOUBLE_RANGE, which doubles
the maximum output current. When this is enabled, the following setup changes apply:
● IMAX now corresponds to twice the value computed by the formula in Section 5.6.2.



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