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UC2625Q

Part # UC2625Q
Description BRUSHLESS DC MTR CONTROL28-PIN PLCC
Category IC
Availability Out of Stock
Qty 0
Qty Price
1 + $10.45630



Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

13
UC1625
UC2625
UC3625
21
27
25
22
6
28
1
15
24326
10k
3k
10k
2 19
20
16
11
20µF
100nF
20µF
100nF
+
R
OSC
33k
2200pF
C
OSC
68k
R
T
3nF
C
T
BRAKE
5nF 100nF
23 8 9 10 4 5 7
2nF
2nF
2nF
100nF
10k
5nF
240
240
17
18
14
13
12
3k
2N3906
100nF
1k
4k
TO OTHER
CHANNELS
TO OTHER
CHANNELS
10
2N3904
10
IRF9350
IRF532
3k
FROM
HALL
SENSORS
VMOTOR+15V
+5V TO HALL
SENSORS
VREF
0.02
R
S
TO
MOTOR
0.02
R
D
REQUIRED
FOR
AVERAGE
CURRENT
SENSING
REQUIRED
FOR BRAKE
AND FAST
REVERSE
100µF
+
UC3625
DIR
QUAD
APPLICATION INFORMATION (cont.)
Figure 13. 45V/8A brushless DC motor drive circuit.
NChannel power MOSFETs are used for lowside driv
-
ers, while PChannel power MOSFETs are shown for
highside drivers. Resistors are used to level shift the
UC3625 opencollector outputs, driving emitter follow
-
ers into the MOSFET gate. A 12V zener clamp insures
that the MOSFET gatesource voltage will never exceed
12V. Series 10 gate resistors tame gate reactance,
preventing oscillations and minimizing ringing.
The oscillator timing capacitor should be placed close to
pins 15 and 25, to keep ground current out of the capac
-
itor. Ground current in the timing capacitor causes oscil
-
lator distortion and slaving to the commutation signal.
The potentiometer connected to pin 1 controls PWM
duty cycle directly, implementing a crude form of speed
control. This control is often referred to as voltage
modebecause the potentiometer position sets the aver
-
age motor voltage. This controls speed because
steadystate motor speed is closely related to applied
voltage.
Pin 20 (Tach-Out) is connected to pin 7 (SPEED IN)
through an RC filter, preventing direction reversal while
the motor is spinning quickly. In twoquadrant opera
-
tion, this reversal can cause kinetic energy from the mo
-
tor to be forced into the power MOSFETs.
A diode in series with the low-side MOSFETs facilitates
PWM current control during braking by insuring that
braking current will not flow backwards through lowside
MOSFETs. Dual currentsense resistors give continu
-
ous current sense, whether braking or running in
fourquadrant operation, an unnecessary luxury for
twoquadrant operation.
The 68k and 3nF tachometer components set maxi
-
mum commutation time at 140µs. This permits smooth
operation up to 35,000 RPM for fourpole motors, yet
gives 140µs of noise blanking after commutation.
UNITRODE CORPORATION
7 CONTINENTAL BLVD. MERRIMACK, NH 03054
TEL. (603) 424-2410 FAX (603) 424-3460
UDG-99045
PACKAGING INFORMATION
Orderable Device Status
(1)
Package
Type
Package
Drawing
Pins Package
Qty
Eco Plan
(2)
Lead/Ball Finish MSL Peak Temp
(3)
5962-9168901MXA OBSOLETE CDIP J 28 TBD Call TI Call TI
UC1625J OBSOLETE CDIP J 28 TBD Call TI Call TI
UC1625J883B OBSOLETE CDIP J 28 TBD Call TI Call TI
UC1625L OBSOLETE LCCC FK 28 TBD Call TI Call TI
UC1625L883B OBSOLETE LCCC FK 28 TBD Call TI Call TI
UC2625DW ACTIVE SOIC DW 28 20 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
UC2625DWTR ACTIVE SOIC DW 28 1000 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
UC2625N ACTIVE PDIP N 28 13 TBD Call TI Level-NA-NA-NA
UC2625Q ACTIVE PLCC FN 28 37 TBD Call TI Level-2-220C-1 YEAR
UC2625QTR ACTIVE PLCC FN 28 750 TBD Call TI Level-2-220C-1 YEAR
UC3625DW ACTIVE SOIC DW 28 20 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
UC3625DWTR ACTIVE SOIC DW 28 1000 Green (RoHS &
no Sb/Br)
CU NIPDAU Level-2-260C-1 YEAR
UC3625N ACTIVE PDIP N 28 13 TBD Call TI Level-NA-NA-NA
UC3625Q ACTIVE PLCC FN 28 37 TBD Call TI Level-2-220C-1 YEAR
UC3625QTR ACTIVE PLCC FN 28 750 TBD Call TI Level-2-220C-1 YEAR
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
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PACKAGE OPTION ADDENDUM
www.ti.com
19-Jul-2005
Addendum-Page 1
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