AM9468
Document overview
- Manufacturer or author: Diodes Incorporated
- PDF pages: 16
Technical content
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 = 1Ω will Achieve 250mA Current Limit Thermal Shut-Down (TSD) Circuit Lead-Free Finish; RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments (Top View) REGH 5VREG VCONT RMI FG RD HIN+ HB HIN- CPWM PWM GND3 RF OUT21 OUT1 VDD TSSOP-16
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) compliant. All applicable RoHS exemptions applied. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Hal ogen- 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 Green
Document number: DS38663 Rev. 1 - 2 2 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Typical Applications Circuit (Notes 4 and 5 ) REGH 5VREG VCONT RMI FG RD HIN+ HB HIN- CPWM PWM GND3 RF OUT21 OUT1 Dz D1 RF CPWM Hall PWM signal for speed control SYSTEM POWER AM9468 VDD Motor Coil Typical Applications Circuit for PWM Speed Control REGH 5VREG VCONT RMI FG RD HIN+ HB HIN- CPWM PWM GND3 RF OUT21 OUT1 Dz D1 RF CPWM SYSTEM POWER VPWM Hall AM9468 VDD Motor Coil Typical Applications Circuit for VCONT/RMI Control Notes: 4. C1 is for power stabilization and to strengthen the noise immunity and should be as close to the V DD pin as possible. Th e recommended value for C1 is 1µF typically. The value of capacitor can be optimized depending on the operating mode, motor voltage and the motor current. For PWM speed c ontrol mode, with datasheet current capability, the recommended capacitor value is 1µ F. The value of the C1 should be checked in the motor design and route in its operating conditions if it is reduced or increased from the recommended value of 1µ F. 5. Diode D1 is for the reverse connection protecti on. In addition to power stabilization and noise immunity, C1 also absorbs regenerative motor spikes. Depending on the amount of regenerative voltage spike, value of C1 needs to be adjusted. The zener diode D z is used to clamp the regenerative voltage spike from the motor operation to safe level when reverse blocking diode D1 is used. If reverse blocking diodes is not used, the use of zener clamp Dz depends on the supply voltage capability to effectively sink the regenerative energy and voltage spike. The v alue of C1 and the requirement Dz needs to be verified on each application design.
Document number: DS38663 Rev. 1 - 2 3 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Pin Descriptions Pin Number Pin Name Description
1 OUT1 Output drive - source & sink capable pin
2 VDD Power supply input pin
3 REGH High side regulator output voltage
4 5VREG 5V regulator output voltage 5 VCONT Output duty control pin in DC signal speed control mode; Voltage in VCONT is compared with triangular wave on CPWM for the output duty ratio.
6 RMI Output minimum duty (minimum speed) control pin for CPWM
7 FG Frequency Generator (FG) - The FG output is same as the magnetic change frequency
8 RG Rotor lock detect open drain output
9 HIN+ Hall device positive input pin
10 HB Hall bias voltage
11 HIN- Hall device negative input pin
12 CPWM Capacitor connection pin for PWM oscillator and main clock
13 PWM PWM signal input pin for PWM speed control mode. The PWM on this pin controls the output duty directly.
14 GND Ground pin
15 RF Current limit set pin; Connect a resistor between RF pin and GND, current limit is defined by 250mV/RF
16 OUT2 Output drive - source & sink capable pin
+ + -- VDD High Side Regulator Low Side Regulator Bias Generate Level Shift OUT2 OSC& Clock PWM Logical Control Centre HB HIN+ HIN- HB TBD REGH 5VREG VCONT
Document number: DS38663 Rev. 1 - 2 4 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Absolute Maximum Ratings (Note 6) @TA = +25° C, unless otherwise specified.) Symbol Characteristics Rating Unit VDD_MAX Maximum Supply Voltage (Note 7) 24 V VREVERSE Reverse Supply Voltage on All Pins -0.3 V VPWM_MAX Maximum Voltage on Logic PWM Pin 7 V IOUT(PEAK) Maximum Output Current (Peak) 1,200 mA IOUT(CONT) Maximum Continuous Current 500 mA IRD Maximum RD Output Current 5 mA VRD Maximum RD Voltage 24 V IFG Maximum FG Output Current 5 mA VFG Maximum FG Voltage 24 V IHB Maximum HB Output Current 10 mA PD Power Dissipation (Notes 8 & 9) TSSOP-16 1,610 mW TSTG Storage Temperature Range -65 to +150 oC TJ Maximum Junction Temperature +150 C ESD HBM Human Body Model ESD Capability 4 kV Notes: 6. Stresses greater than the 'Absolute Maxi mum Ratings' specified above may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not im plied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time . 7. The absolute maximum V DD of 24V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to operate the device at the absolute maximum rated conditions for any period of time. 8. For thermal de-rating curves under different PCB sizes and layout conditions, see thermal performance section. 9. AM9468 exposed pad soldered to minimum recommended landing pads (see Package Outline Dimension section) on 3inch x 4.5 inch four-layer 2oz.copper glass epoxy PCB (1.6mm thickness), calculated in accordance with JESD 51 -7. See thermal performance section. Recommended Operating Conditions Symbol Characteristic Conditions Min Max Unit VDD Supply Voltage When The Device Is Operating Normally With All Circuits Active Operating; All circuits active 2.4 18 V VICM Hall Input Common-Mode Input Voltage Range – 0.3 V5VREG -1.5V V VCONTIN VCONT Input Voltage Range – 0.3 V5VREG V VRMIN RMI Input Voltage Range – 0.3 V5VREG V TA Operating Temperature Range Operating -40 +105 C Electrical Characteristics (Note 10) (@TA = +25° C, VDD = 12V, unless otherwise specified.) Symbol Characteristics Conditions Min Typ Max Unit IDD Supply Current – – 2.5 4.0 mA VOV_TH Over Voltage Protection Threshold for Shutdown to Standby Mode Voltage increasing 19.5 20.5 21.5 V VOV_RLTH Over Voltage Release Threshold Voltage decreasing 18.3 19.5 20.5 V Note: 10. Typical data is measured at TA = +25C, VDD = 12V. The maximum and minimum parameters values over operating temperature range are not tested in production, they are guaranteed by design, characterization and process control.
Document number: DS38663 Rev. 1 - 2 5 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Electrical Characteristics (Note 11) (@TA = +25° C, VDD = 12V, unless otherwise specified.) (Cont.) Symbol Characteristics Conditions Min Typ Max Unit VO Output On Voltage, Source + Sink IOUT =500mA (Source+Sink) TA = -40° C to +105oC – 0.45 0.68 V VRF Current Limit Voltage TA = -40° C to +105oC 230 250 270 mV VRGL 5VREG Output Voltage I5VREG = 5mA, TA = -40° C to +105oC 4.8 5 5.2 V VRGH REGH Output Voltage IREGH = 5mA VDD - 4.6 VDD - 4.2 VDD – 3.9 V VHB Hall Bias Output Voltage IHB = 5mA, TA = -40° C to +105°C 1.20 1.25 1.30 V IHIN Hall Input Bias Current – – – 0.5 µA VINOFS Hall Amplifier Output Offset Voltage – -5 – 5 mV GH Hall Amplifier Voltage Gain – 48 52 – dB VPWML PWM Pin Input Low – 0 – 1.2 V VPWMH PWM Pin Input High – 1.8 – 5VREG V IPWM PWM Pin Bias Current PWM=GND -17 -10 -6 µA tPWM_MIN Input PWM Smallest Width – 2 – – µs fPWM_RANGE External Input PWM Frequency Range – 8 – 100 kHz ICPC CPWM Charge Current TA = -40° C to +105°C 16.4 – 19.6 µA ICPD CPWM Discharge Current TA = -40° C to +105°C 16.4 – 19.6 µA RCP CPWM Charge/Discharge Current Ratio RCP = ICPC / ICPD 0.9 1 1.11 – VCPH CPWM Oscillation High Level TA = -40° C to +105° C 3.35 3.5 3.65 V VCPL CPWM Oscillation Low Level TA = -40° C to +105° C 0.95 1.0 1.05 V VCPA CPWM Oscillation Amplitude TA = -40° C to +105° C 2.3 2.5 2.7 V fCPWM CPWM Oscillation frequency CPWM = 100pF – 36 – kHz ICONT VCONT Pin Input Bias Current – – – 0.3 µA IRMI RMI Pin Input Bias Current – – – 0.3 µA VRD RD Output Low Voltage IRD = 3mA – – 0.3 V IRDL RD Output Leakage Current VRD = 18V – – 1 µA VFG FG Output Low Voltage IFG = 3mA – – 0.3 V IFGL FG Output Leakage Current VFG = 18V – – 1 µA ΔVFG FG Comparator Hysteresis – – ±5 – mV tLCK_DET_ON Output ON Time in Lock Detection CPWM = 100pF – 0.5 – s tOFF Output OFF Time in Lock Mode CPWM = 100pF – 4.5 – s RT Output OFF/ON Ratio in Lock Detection CPWM = 100pF, RT = tACT / tDET – 9 – s TJ_SDN_TH IC Junction Temperature Thermal Shutdown Threshold – – +175 – oC TJ_SDN_HYST IC Junction Temperature Thermal Shutdown Hysteresis – – +25 – oC Note: 11. Typical data is measured at T A = +25C, VDD = 12V. The maximum and minimum parameters values over operating temperature range are not tested in production, they are guaranteed by design, characterization and process control.
Document number: DS38663 Rev. 1 - 2 6 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Operating Characteristics Standby and Start-up Timing When PWM pin input signal is logic “L” level continuously for time longer than tSLP, the device enters standby mode as shown below. When PWM pin signal is “H” level , the device turns active and operates normally. The PWM pin is also used to control the motor speed with external PWM signal into this pin. The lowest frequency PWM signal is defined by tSLP, i.e. the PWM duty low time has to be smaller tSLP for motor speed control. tSLP = 400µs typical PWM HB OUT1/OUT2 VDD Active Stand-by Active Stand-by Active tSLP tSLP In Normal Operation/Rotation PWM OUT1 OUT2 FG HIN+-HIN- RD HYS HYS Truth Table for Various Modes with PWM pin HIN+ HIN- PWM OUT1 OUT2 FG MODE H L H H L L Drive L L L Regenerate L H H L H OFF Drive L L L Regenerate
Document number: DS38663 Rev. 1 - 2 7 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Operating Characteristics (Cont.) VCONT/RMI Control Truth Table for Various Modes with VCONT/RMI PIN Note: 12. PWM2 is internal signal. HIN+ HIN- PWM2 (Note 12) OUT1 OUT2 FG MODE H L H H L L Drive L L L Regenerate L H H L H OFF Drive L L L Regenerate PWM OUT1 OUT2 FG HIN+-HIN- RD VCONT RMI CPWM HYS HYS PWM Duty=100% VCONT Control RMI Control PWM Duty=0%
Document number: DS38663 Rev. 1 - 2 8 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Operating Characteristics (Cont.) Motor Lock OUT1 OUT2 FG RD HIN+- HIN- Motor Lock Motor Re-roration tLCK_DET_ON 0.5s (typ) tOFF 4.5s (typ) Waiting for FG Pulse Motor Protection Startup Support 50% Duty Release FG Detection
Document number: DS38663 Rev. 1 - 2 9 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Application Note HIN-Bias – Hall Bias Output This is a 1.25V nominal voltage source to bias a differential un -buffered Hall element sensor. If a Hall element requires a lower voltage than the HIN-Bias output, connect an appropriate value resistor between the HIN-Bias pin and the Hall element supply pin. HIN+ and HIN- – Hall Inputs The rotor position is detected by a Hall sensor, with the output of Hall sensor applied to the HIN+ and HIN- pins. This sensor can be either a 4 pin 'naked' Hall device or of the 3 pin buff ered switching type. For a 4 pin device the differential Hall output signal is connected to the HIN+ and HIN- pins. For a buffered Hall sensor the Hall device output is attached to the HIN+ pin, with a pull-up attached if needed, whilst the HIN- pin has an external potential divider attached to hold the pin at half VREF. When HIN+ is high in relation to HIN-, OUT2 is the active drive. PWM Pin - External PWM Signal Input for PWM Speed Control Mode In PWM speed control mode, external PWM signal is applied at this PWM pin to control the motors speed. The duty ratio of the PWM signal input to this pin controls the fan motor speed by varying the output PWM drive directly. CPWM Pin Internal motor control triangular wave is generated based on the capacitor on this pin. A capacitor of 100pF (C PWM = 100pF), will provide a triangular wave of 36kHz (typ). The VCONT and RMI signals are compared with this triangular wave to generate the speed control PWM drive and minimum speed control clamp points. The output PWM drive frequency is same as the triangular waveform frequency. FG/RD Pin FG is the Frequency Generator (tachometer) output and is a buffered signal from the Hall sensor. RD is the fan locked status detector. FG and RD are open-drain outputs and will require external pull-up resistors. Typically a pull-up resistor of 10kΩ is recommended from FG and RD pins to the supply voltage. RF Pin The current limiter is activated when the voltage between current detection resistor exceeds 0.25V between GND and RF. The current limiter is activated at IO = 250mA when RF = 1Ω. The current limit is set with a RF resistor between RF pin and GND pin. RMI Pin – Minimum Speed Setting Pin RMI is the minimum speed setting pin. DC voltage on this pin sets minimum speed value; If you do not use RMI (minimum speed control), please connect it to 5VREG. VCONT Pin – DC Voltage Speed Control VCONT is DC voltage inputs speed control pin. The voltage on the VCONT pin is compared with the triangular oscillation o n the CPWM pin to generate the output drive PWM signal. For the control method, refer to the timing chart. REGH/5VREG Pin Please insert capacitor value 1µ F between 5VREG and GND for regulated output voltage stabilization; insert capacitor value 1µ F value between VDD and REGH for stable output voltage. OUT1 and OUT2 pin OUT1 and OUT2 pins provide H-bridge driver output for fan and motor coil connection. VDD – Device Supply Voltage This provides the supply for the device. GND – Supply Return This is the device supply ground return pin for control signal.
Document number: DS38663 Rev. 1 - 2 10 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Application Note (Cont.) Speed Control This device allows both DC voltage input and PWM signal input for speed control. Typically only one of the method is used to control the motor speed. In DC voltage speed control mode, the voltage on the VCONT pin is compared with the CPWM triangular wave to generate internal PWM signal to drive the output. In PWM speed control mode, the PWM signal on the PWM pin directly controls the output PWM drive. The typical application circuits shows the two speed control methods. 1. Speed Control by PWM Pin REGH 5VREG VCONT RMI FG RD HIN+ HB HIN- CPWM PWM GND3 RF OUT21 OUT1 Dz D1 RF CPWM Hall PWM signal for speed control SYSTEM POWER AM9468 VDD Motor Coil 2. Speed Control by VCONT/RMI Pin REGH 5VREG VCONT RMI FG RD HIN+ HB HIN- CPWM PWM GND3 RF OUT21 OUT1 Dz D1 RF CPWM SYSTEM POWER VPWM Hall AM9468 VDD Motor Coil
Document number: DS38663 Rev. 1 - 2 11 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Typical Operating Characteristics Average Supply Current Lock Detect tLCK_DET_ON and Shutdown tOFF Periods Current Limits Current Limit (250mV) vs. Temperature VREF (V) VREF (V) VREF
Document number: DS38663 Rev. 1 - 2 12 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Typical Operating Characteristics (Cont.) AM9468 Total Resistance Total H-Bridge Path Resistance – Total RDS(ON) of High Side and Low Side Switches
Document number: DS38663 Rev. 1 - 2 13 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Thermal Performance TSSOP-16 Power Dissipation De-rating Curve 1 (Note 13) TA (C) -40 0 25 50 60 70 80 85 90 95 100 105 110 120 125 130 140 150 PD (mW) 3,520 3,520 3,520 2,816 2,534 2,253 1,971 1,830 1,690 1,549 1,408 1,267 1,126 845 704 563 282 0 Note 13: TSSOP-16 is soldered on FR-4 substrate 4-layer 1.6mm thickness PCB board, calculated in accordance with JESD 51-7. TSSOP-16 Power Dissipation De-rating Curve 2 (Note 14) TA (C) -40 0 25 50 60 70 80 85 90 95 100 105 110 120 125 130 140 150 PD (mW) 2,090 2,090 2,090 1,672 1,505 1,338 1,170 1,087 1,003 920 836 752 669 502 418 334 167 0 layer 2oz.copper FR-4 PCB (1.6mm thickness) with partial copper flood on the bottom layer. TSSOP-16 Thermal Derating Curve TSSOP-16 Thermal Derating Curve
Document number: DS38663 Rev. 1 - 2 14 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Thermal Performance Circular PCB Dimensions 2oz.copper FR-4 PCB (1.6mm thickness) with partial copper flood on the bottom layer. Custom Circular PCB – Top View Custom Circular PCB – Bottom View
Ordering Information
13 : Tape & ReelT16: TSSOP-16 Product Name Part Number Package Code Packaging 13” Tape and Reel Quantity Part Number Suffix AM9468-T16-13 T16 TSSOP-16 2500/Tape & Reel -13 Marking Information (1) Package Type: TSSOP-16 ( Top View ) AM9468 YY WW X X Logo Product Name WW : Week : 01~52; 52 YY : Year : 14,15,16~ X X : Internal Code represents 52 and 53 week 16 9
Document number: DS38663 Rev. 1 - 2 15 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT Package Outline Dimensions Please see http://www.diodes.com/package-outlines.html for the latest version. (1) Package Type: TSSOP-16 Ø0.760Depth0.050± 0.02 x) C DETAIL 'A' PIN 1 e b E E/2 A D X Y SEE DETAIL 'A' SEATING PLANE GAUGE PLANE R L TSSOP-16 Dim Min Max Typ A - 1.08 - A1 0.05 0.15 - A2 0.80 0.93 - b 0.19 0.30 - c 0.09 0.20 - D 4.90 5.10 - E 6.40 BSC E1 4.30 4.50 - e 0.65 BSC L 0.45 0.75 - L1 1.00 REF L2 0.25 BSC R / R1 0.09 - - X - - 1.350 Y - - 1.050 θ 0° 8° - θ1 5° 15° - θ2 0° - - All Dimensions in mm Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. (1) Package Type: TSSOP-16 Y X C Dimensions Value (in mm) C 0.650 X 0.350 X1 4.900 Y 1.400 Y1 6.800
Document number: DS38663 Rev. 1 - 2 16 of 16 www.diodes.com May 2016 © Diodes Incorporated AM9468 NEW PRODUCT IMPORTANT NOTICE DIODES INC ORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assum e any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license unde r its patent or trademark rights, nor the rights of others. Any Customer or user of this docume nt or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diod es Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customer s shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising ou t of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product nam es and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided i n the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support d evices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety -critical, life support devices or systems, notwithstanding any devices - or systems -related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorpora ted and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2016, Diodes Incorporated www.diodes.com