AMIS-30521 Micro-stepping Motor Driver Data Sheet
6.3 DC Parameters
The DC parameters are given for V
BB
and temperature in their operating ranges unless otherwise specified. Convention: currents
flowing in the circuit are defined as positive.
Table 5: DC Parameters
Symbol Pin(s) Parameter Remark/Test Conditions Min. Typ. Max. Unit
Supply Inputs
V
BB
Nominal operating supply range 6 30 V
I
bat
VBB
Total current consumption Unloaded outputs 8 mA
V
dd
VDD Logic supply voltage 4.75 5 5.25 V
Power-on-Reset (POR)
V
DDH
Internal POR comparator threshold VDD rising 4.0 4.25 4.4 V
V
DDL
VDD
Internal POR comparator threshold VDD falling 3.68 V
Motordriver
I
MDmax,Peak
Max current through motor coil in
normal operation
1600 mA
I
MDmax,RMS
Max RMS current through coil in normal
operation
800 mA
I
MDabs
Absolute error on coil current -10 10 %
I
MDrel
Error on current ratio I
coilx
/ I
coily
-7 7 %
V
bb
= 12V, T
j
= 27 °C 0.45 0.56
Ω
R
HS
On-resistance high-side driver,
CUR[4:0] = 0...31
V
bb
= 12V, T
j
= 160 °C 0.94 1.25
Ω
V
bb
= 12V, T
j
= 27 °C 0.45 0.56
Ω
R
LS3
On-resistance low-side driver,
CUR[4:0] = 23...31
V
bb
= 12V, T
j
= 160 °C 0.94 1.25
Ω
V
bb
= 12V, T
j
= 27 °C 0.90 1.2
Ω
R
LS2
On-resistance low-side driver,
CUR[4:0] = 16...22
V
bb
= 12V, T
j
= 160 °C 1.9 2.5
Ω
V
bb
= 12V, T
j
= 27 °C 1.8 2.3
Ω
R
LS1
On-resistance low-side driver,
CUR[4:0] = 9...15
V
bb
= 12V, T
j
= 160 °C 3.8 5.0
Ω
V
bb
= 12V, T
j
= 27 °C 3.6 4.5
Ω
R
LS0
On-resistance low-side driver,
CUR[4:0] = 0...8
V
bb
= 12V, T
j
= 160 °C 7.5 10
Ω
I
Mpd
MOTXP
MOTXN
MOTYP
MOTYN
Pull-down current HiZ mode 0.5 mA
Logic Inputs
I
leak
Input leakage
(3)
Tj = 160 °C 1 µA
V
inL
Logic low threshold 1.5 V
V
inH
DI, CLK
NXT, DIR
CLR, CSB
Logic high threshold 3.5 V
R
pd
CLR
TST0
Internal pull-down resistor 120 300
kΩ
Thermal Warning and Shutdown
T
tw
Thermal warning 138 145 152 °C
T
tsd
(1) (2)
Thermal shutdown T
tw
+ 20 °C
Charge Pump
6V< V
BB
< 15V 2 * V
BB
– 2.5 V
V
cp
Output voltage
15V < V
BB
< 30V V
BB
+12.5 V
BB
+14 V
BB
+15.5 V
C
buffer
VCP
External buffer capacitor 180 220 470 nF
C
pump
CPP CPN External pump capacitor 180 220 470 nF
Notes:
(1) No more than 100 cumulated hours in life time above Tt
w.
(2) Thermal shutdown and low temperature warning are derived from thermal warning.
(3) Not valid for pins with internal pull-down resistor.
5
AMI Semiconductor – June 2007, M-20683-001
www.amis.com
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