E-L9935013TR STMicroelectronics, E-L9935013TR Datasheet - Page 13

• Manufacturer Part Number: E-L9935013TR
• Description: IC STEPPER MOTOR DVR 2PH 20PWRSO
• Manufacturer: STMicroelectronics
• Type: 2 Phase Stepper Motor Driverr

Specifications of E-L9935013TR

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 1
• Current - Output: ±1.2A
• Voltage - Supply: 8 V ~ 24 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: PowerSO-20 Exposed Bottom Pad
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 14.4 V
• Supply Current: 4.5 mA
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-10346-2; E-L9935013TR

L9935
5.2
5.2.1
5.2.2
5.2.3
Full bridge function
Figure 5.
No current
Bit 5, bit 4 (corresponding bit 2 and bit1 for bridge B) both are HIGH, the current logic will
inhibit all drivers D
signal of the current sense comparator comp 1.
Turning on
Changing bit 5 or bit 4 or both to LOW will turn on either M
(depending on the phase signal bit 3). Current will start to flow through the load. The current
will be sensed by the drop across R
The threshold of the comparator comp 1 depends on the current settings of bit 5 and bit 4.
The current will rise until it exceeds the turn off threshold of comp 1.
Chopping
Exceeding the threshold of comp 1 the drive logic will turn off the sink transistor (M
M
turning on M
switch over spikes caused by capacitive load components up to 5 nF.
Turning off for example M
wheeling current flows through M
This leads to a slow current decay during flyback. Maximum duty cycles of more than 85%
(at f
shown in
22
). The sink transistor periodically is turned on again by the oscillator. Immediately after
OSC
= 25 kHz) are possible. In this case current flows of both bridges will overlap (not
Figure
12
Displays a full bridge including the current sense circuit.
or M
7).
11
22
, D
the comparator comp 1 will be inhibited for a certain time to blank
12
, D
12
will yield a flyback current through D
21
, D
Doc ID 5198 Rev 9
22
21
, the load and D
1
turning off M
.
11
, M
11
).
12
, M
11
21
, M
and M
22
11
. (So now the free
independently from the
Functional description
22
or M
21
and M
12
12
or
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