Requiring a minimum of external components, the UDN3625M
and UDN3626M are monolithic ICs that provide single-chip control
and direct drive solutions for many small, single-phase, unipolar
brushless dc motor applications. Integrated into the ICs are a high-
sensitivity Hall-effect sensor, control and commutating logic, a stable
voltage regulator, extensive self and system protective functions, and
two high-current saturated npn outputs. Both ICs include thermal
shutdown, output over-current limiting, and output transient protection/
flyback diodes. The UDN3625M is nominally for 12 V motor applica-
tions while the UDN3626M is better suited to 24 V motors.
Output over-current limiting (relating to startup surge or a locked
rotor condition) and short-circuit protection are provided by an internal
current-sense resistor. The maximum (default) output load current is
typically 1.3 A for the UDN3625M or 600 mA for the UDN3626M,
but may be decreased by user selection of an external low-wattage
resistor.
A separate low-level output provides tachometer capability for
motor speed control or sensing a locked rotor condition. With appro-
priate external logic, pulse-width modulated (PWM) speed control can
be accomplished at the output current adjust pin.
These sensor/drivers are supplied in an 8-pin mini-DlP plastic
package with a copper leadframe for increased package power
handling capability.
POWERHALL
®
SENSOR/DRIVERS
FOR BRUSHLESS DC MOTORS
Always order by complete part number, e.g., UDN3625M .
See Maximum Ratings at left.
Supply Voltage, V
CC
. . . . . . . . . . See Table
Output Current, I
O
. . . . . . . . . . . . See Table
PWM Current Control Voltage,
V
ADJ
. . . . . . . . . . . . . See Applications
Magnetic Flux Density, B . . . . . . Unlimited
Package Power Dissipation,
P
D
. . . . . . . . . . . . . . . . . . . . See Graph
Operating Temperature Range,
T
A
. . . . . . . . . . . . . . . . . -20°C to +85°C
Storage Temperature Range,
T
S
. . . . . . . . . . . . . . . . -65°C to +150°C
Output current rating will be limited by
ambient temperature, supply voltage, and
duty cycle. Under any set of conditions, do
not exceed a junction temperature of
+150°C.
UDN3625M UDN3626M
V
CC(MAX)
14 V 26 V
I
O(CONT)
1.0 A 0.45 A
I
O(PEAK)
1.6 A 0.75 A
ABSOLUTE MAXIMUM RATINGS
Data Sheet
27690A
FEATURES
a73 900 mA/12 V or 400 mA /24 V Operation
a73 Speed-Control (PWM) Capability
a73 Locked-Rotor Indication
a73 Minimum External Components
a73 Over-Current Protected
a73 Thermal Protection
a73 Enhanced Reliability
a73 Reduced Cost
3625 AND
3626
CONTACT FACTORY
for availability
and latest information