AM9469 Datasheet: LOW NOISE SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER





AM9469 LOW NOISE SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Datasheet

Part Number AM9469
Description LOW NOISE SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER
Manufacture Diodes
Total Page 16 Pages
PDF Download Download AM9469 Datasheet PDF

Features: Description Green AM9469 LOW NOISE SING LE PHASE FULL WAVE DIRECT PWM MOTOR DRI VER Pin Assignments The AM9469 is a hi gh performance, ultra-low noise single phase (single-coil) brushless direct cu rrent (BLDC) fan and motor driver. The integrated full-bridge driver output st age uses BTL linear driver architecture to minimize audible switching noise an d Electromagnetic Interference (EMI) pr oviding a low noise solution. For syste m flexibility the motor speed can be co ntrolled by either an external PWM sign al or by a DC voltage or from a thermis tor network. Based on the input signal, the AM9469 adjusts the output duty cyc le. (Top View) OUT1 1 VDD 2 REGH 3 16 OUT2 15 RF 14 GND To help protect the motor coil, the AM9469 provides Rotor Lock Protection which shuts down the ou tput drive if rotor lock is detected. T he device automatically restarts when t he rotor lock is removed. In case of ov er voltage, the device shuts down the o utput drive and enters standby mode to help prevent over voltag.

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Description
Green AM9469
LOW NOISE SINGLE PHASE FULL WAVE
DIRECT PWM MOTOR DRIVER
Pin Assignments
The AM9469 is a high performance, ultra-low noise single phase
(single-coil) brushless direct current (BLDC) fan and motor driver. The
integrated full-bridge driver output stage uses BTL linear driver
architecture to minimize audible switching noise and Electromagnetic
Interference (EMI) providing a low noise solution.
For system flexibility the motor speed can be controlled by either an
external PWM signal or by a DC voltage or from a thermistor network.
Based on the input signal, the AM9469 adjusts the output duty cycle.
(Top View)
OUT1 1
VDD 2
REGH 3
16 OUT2
15 RF
14 GND
To help protect the motor coil, the AM9469 provides Rotor Lock
Protection which shuts down the output drive if rotor lock is detected.
The device automatically restarts when the rotor lock is removed. In
case of over voltage, the device shuts down the output drive and
enters standby mode to help prevent over voltage stress on the coil.
Over temperature shutdown provides thermal protection for the
device.
5VREG 4
VCONT 5
RMI 6
FG 7
RD 8
13 PWM
12 CPWM
11 IN2
10 HB
9 IN1
A Tachometer output is provided by the open-drain Frequency
Generator (FG) Pin which allows external interface to monitor motor
rotation or speed. The FG output is the magnetic change frequency.
Additionally, a rotor lock detect output is provided by the open-drain
RD Pin.
TSSOP-16EP (Type DX)
AM9469 is available in thermally enhanced TSSOP-16EP (Type DX)
with exposed pad.
Features
Single-Phase Full Wave BLDC Fan/Motor Drive with BTL Output
(BTL Amplifier Gain = 49dB)
Low Noise Architecture
Wide Operating Voltage Range: 2.4V to 18V
PWM Speed Control with External PWM Input
DC Voltage Speed Control by Adjusting VCONT and RMI
Voltage
Hall Bias Output: VHB = 1.25V
Built-In Quick Start Circuit
Lock Protection with Automatic Restart
Frequency Generator (FG) Output
Rotor Lock Detection (RD) Output
Current Limit Circuit
RF Defines The Current Limit; RF = 1will Achieve 250mA
Current Limit
Thermal Shut-Down (TSD) Circuit
Low Profile Package: TSSOP-16EP (Type DX) with Exposed
Pads for Power Handling Capability
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
9V/12V/15V BLDC Cooling Fans and Motors
CPU Cooling Fans for Notebooks and Desktop BLDC Fans
Instruments Cooling Fans
Medium Voltage, Low Power BLDC Motors
Notes:
1. EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. All applicable RoHS exemptions applied.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green‖ products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds
AM9469
Document number: DS38810 Rev. 2 - 2
1 of 16
www.diodes.com
April 2018
© Diodes Incorporated

                    
                    






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