DRV8808 Datasheet, PDF (10/38 Pages) Texas Instruments – COMBINATION MOTOR DRIVER WITH DC-DC CONVERTER

DRV8808
SLVS857A – DECEMBER 2009 – REVISED AUGUST 2011
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
T_J = 0°C to 135°C, V_M = 7 V to 38 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
VRS_TRIP
Internal current trip
00
01
10
11
External resistor sense voltage 00
trip threshold
01
10
11
P_minp
Minimum pulse width (phase)
(19)
P_mine
Minimum pulse width (enable) ⁽¹⁹⁾
Serial Interface⁽²⁸⁾
f(CLK)
Clock frequency
t_wh(CLK)
t_wl(CLK)
t_dcs
t_dch
t_dss
t_dsh
t_css
t_csh
t_nss
Minimum high-level pulse width
Minimum low-level pulse width
Setup time, DATA to CLK↓
Hold time, CLK↓ to DATA
Setup time, DATA to STROBE↑
Hold time, STROBE↑ to DATA
Setup time, CLK↓ to STROBE↑
Hold time, STROBE↑ to CLK↓
Setup time, nSLEEP↓ to
STROBE↑
t_nsh
Hold time, STROBE↑ to
nSLEEP↑
t_w(STRB)
Minimum strobe pulse width
Serial Interface: ID Monitor Function at Logic_out Pin, Extended Setup Mode ⁽³¹⁾
t_ODL
0 data output delay bit 3 to 0
From strobe rise to Logic_out
(ext-setup) = (1100)
(1 kΩ to external 3.3 V)
t_ODH
1 data output delay bit 3 to 0
(ext-setup) = (1111)
MIN
1.18
1.48
1.68
1.98
165
190
240
290
10
10
10
10
10
10
20 ⁽²⁹⁾
20 ⁽²⁹⁾
4 ⁽³⁰⁾
10
20
TYP MAX UNIT
1.4 1.62
A
1.7 1.92
1.9 2.12
2.2 2.42
185
205 mV
210
230
260
280
310
330
1
μs
1
μs
25 MHz
ns
ns
ns
ns
ns
ns
ns
ns
μs
ns
ns
4000
ns
4000
ns
(28) Serial interface timing will not be tested parametrically in production.
(29) DATA value at STROBE is address bit for Setup and Extended Setup register so setup and hold times apply to DATA relative to
STROBE. CLK and DATA also require setup and hold times relative to each other. Therefore, CLK and STROBE setup and hold timing
is the summation of both.
(30) Internal filter on nSLEEP to STROBE drives this specification.
(31) Serial interface timing will not be tested parametrically in production.
Serial Interface
The device has a serial interface port (SIP) circuit block to control dc motor H-bridges, dc-dc regulators, and
other functions, such as blanking time, OFF time, etc. Since the SIP shares its three lines with three of the motor
control signals, the SIP is only available when nSLEEP is low.
nSLEEP
L
H
PIN 9
STB
ENA
Table 1. Serial Interface
PIN 10
CLK
PHA
PIN 14
DATA
PHC
SIP FUNCTIONALITY
Yes
No
10
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