zxbm1016 Zetex Semiconductors plc., zxbm1016 Datasheet - Page 5

• Manufacturer Part Number: zxbm1016
• Description: High Efficiency Variable Speed Single-phase Fan Motor Controller
• Manufacturer: Zetex Semiconductors plc.

Pin description table
Operational functional description
Overview
The ZXBM1016 is a high efficiency, low noise, single-phase DC brushless motor pre-driver. It uses
voltage speed control and this voltage can be derived from either a PWM or thermistor source.
The device contains proprietary circuitry to control and limit the current at the end of a
commutation cycle. This tail-end current control (TECC) enables the use of lower rated
components thus providing for a more economic and higher efficiency solution.
The pre-driver also has the usual minimum speed setting and maximum current control
functions.
Issue 1 - February 2007
© Zetex Semiconductors plc 2007
SetThRef Analogue A variable voltage source used to set the voltage on the SetTh pin
H-Bias
Range
Ph1Lo
Ph2Lo
Sense
ThRef
SetTh
Ph1Hi
Ph2Hi
C
S
C
Gnd
SPD
C
V
Pin
PWM
H+
FG
H-
MIN
LCK
INT
CC
Reference A 5 volt reference for external networks
Reference A nominal 1.75V reference used as the supply for naked Hall sensors
Output
Output
Output
Output
Output
Power
Power
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
Type
Description
The positive supply pin
The negative supply pin
Hall device positive input. When high in relation to H- Ph2 is active
Hall device negative input
Speed control input voltage, typically from a PWM integrator or
thermistor.
When low in relation to C
Used to set a voltage that represents the minimum speed the motor is to
run at
A capacitor on this pin is used to set the PWM frequency
A dual use pin used to set the lock and tail-end current control timing.
This will typically be a 470nF capacitor
A resistor is attached between this pin and ThRef to set the device’s
dynamic operating range to the motor’s desired speed range
A capacitor is attached to this pin for use by the tail-end current control.
This will normally be the same value as that on the C
Open collector buffered output from the Hall sensor
Used to set the threshold voltage that represents the maximum current
to be taken by the motor
Input for the signal from a sense resistor in the ground return of the
H-bridge driving circuit used to represent the current taken by the motor
Phase 1 high power output to high-side of H-bridge
Phase 2 high power output to high-side of H-bridge
Phase 1 high power output to low-side of H-bridge
Phase 2 high power output to low-side of H-bridge
5
PWM
the phase low outputs will be turned on
ZXBM1016
LCK
www.zetex.com
Pin