AM4967
Document overview
- Manufacturer or author: Diodes Incorporated
- PDF pages: 14
Technical content
Document number: DS45176 Rev. 2 - 2 2 of 14 www.diodes.com August 2022 © Diodes Incorporated AM4967 Pin Descriptions Pin Number Pin Name Function 1 OUT2 Second channel P-type driver output. Open-drain output, must be connected with pull-up resistor to drive external power devices in operation 2 OUT2B Second channel N-type driver output. Push-pull output to drive external power devices
3 VCC Power supply
Current limiter indicator. Fixed to 0.2V internally. Maximum allowable current is decided by external sample resistance. When the voltage of this pin exceeds 0.2V, the output will be shut down by current limit. If this function is not used, connect this pin to ground directly 5 VMIN Minimum speed setting terminal. Connect it to VREF when disused. In case it is tied to other power supply for controlling, an isolated resistor is necessary
6 VPWM
Speed control terminal. It is full speed mode when connected to ground. If the speed is controlled by PWM mode, the frequency of control signal is 20kHz to 100kHz. Moreover, a low pass network is necessary to transfer PWM to DC level
7 COSC PWM basic oscillation frequency generator when connected with a capacitor
of 220pF. 30kHz frequency is available.
8 FG/RD
"FG" means pin 8 is an output pin of FG signal which is used for detecting rotation speed. "RD" means pin 8 is an output pin of RD signal, and is used for detecting fan rotate-stop state. "FG" and "RD" can be selected according to the requirement. This pin need to be connected with pull-up resistor when used. A new pulse will be generated once input signal changed. Keep this pin open when it is not to be used
9 HIN-
Hall sensor negative input. To prevent noise, this pin is recommended to be placed as close as possible to Hall circuit. If necessary, a capacitor may be added between HIN+ and HIN- to reduce the influence caused by noise 10 HIN+ Hall sensor positive input. To avoid noise, this pin is recommended to be placed as close as possible to Hall circuit 11 CT Lock protection and auto start frequency generator. It is connected with an external 0.47μF capacitor which decides lock-rotate time and start time. If lock-rotate protection function is disused, please connect this pin to GND 12 LS Linear start terminal. This pin is connected to VREF externally via a capacitor of 0.47μF to 1μF which enables fan start steadily. Start time is dependent to the capacitance. If linear start function is not used, connect this pin to ground
13 VREF 5V voltage reference
14 GND Ground for circuit control
15 OUT1B First channel N-type driver output. Push-pull output to drive external power devices 16 OUT1 First channel P-type driver output. Open-drain output, must be connected with pull-up resistor to drive external power devices in operation
Figure 3. Functional Block Diagram of AM4967
Document number: DS45176 Rev. 2 - 2 4 of 14 www.diodes.com August 2022 © Diodes Incorporated AM4967 Truth Table 1. Driver-lock. VOSC is High, VPWM, VVMIN and VLS are low. HIN- HIN+ CT OUT1 OUT1B OUT2 OUT2B FG/RD Mode H L L L L OFF H L OUT1 → OUT2 (Driver) L H OFF H L L OFF OUT2 → OUT1 (Driver) H L H OFF L OFF H L Lock Protection L H OFF H OFF L OFF 2. Speed control. VCT, VLS are low. VPWM, VMIN COSC HIN- HIN+ OUT1 OUT1B OUT2 OUT2B Mode L H H L L L OFF H OUT1 → OUT2 (Driver) L H OFF H L L OUT2 → OUT1 (Driver) H L H L OFF L OFF H Regenerative L H OFF H OFF L Ordering Information (Note 4) Package Temperature Part Number Marking ID Packing Type Lead Free Green Lead Free Green SSOP-16 -30 to 105℃ AM4967GS-E1 AM4967GS-G1 AM4967GS AM4967GS-G1 Tube AM4967GSTR-E1 AM4967GSTR-G1 AM4967GS AM4967GS-G1 Tape & Reel AM4967RGS-E1 AM4967RGS-G1 AM4967RGS AM4967RGS-G1 Tube AM4967RGSTR-E1 AM4967RGSTR-G1 AM4967RGS AM4967RGS-G1 Tape & Reel BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with "G1" suffix are available in green package. Note: 4.For packaging details, go to our website at https://www.diodes.com/design/support/packaging/diodes -packaging/ .
Document number: DS45176 Rev. 2 - 2 5 of 14 www.diodes.com August 2022 © Diodes Incorporated AM4967 Absolute Maximum Ratings (Note 5) Parameter Symbol Value Unit Supply Voltage VCC 18 V OUT1B/OUT2B Output Current IOUTB 20 mA OUT1/OUT2 Sink Current IOUT 20 mA OUT1B/OUT2B/OUT1/OUT2 Withstand Voltage VOUT 18 V VPWM/VMIN Withstand Voltage VPWM/VVMIN 7 V LS Withstand Voltage VLS 7 V FG/RD Withstand Voltage VFG/VRD VCC V FG/RD Output Current IFG/IRD 10 mA VREF Output Current IREF 20 mA Power Dissipation (Note 6) PD 800 mW Storage Temperature Range TSTG -55 to 150 °C ESD (Human Body Model) ESD 2000 V Notes: 5. Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Min Typ Max Unit Supply Voltage VCC 5.5 16 V VPWM/VMIN Input Voltage 0 5 V Hall Input Voltage 0.2 3 V Ambient Temperature TA -30 105 °C
Document number: DS45176 Rev. 2 - 2 6 of 14 www.diodes.com August 2022 © Diodes Incorporated AM4967 Electrical Characteristics (VCC=12V, TA=25°C, unless otherwise specified.) Parameter Symbol Condition Min Typ Max Unit Quiescent Current IQ1 Lock off 8 10 12 mA IQ2 Lock on 8 10 12 VREF Reference Voltage VREF IOUT=5mA 4.5 5.0 5.5 V Current Limit Voltage VLIM 186 200 215 mV COSC High Level Voltage VOSCH 3.0 3.4 3.8 V COSC Low Level Voltage VOSCL 0.9 1.1 1.3 V COSC Frequency fOSC CL=220pF 25.4 30 35.5 kHz CT High Level Voltage VCTH 2.4 3.3 3.6 V CT Low Level Voltage VCTL 1.0 1.3 1.6 V CT Charge Current ICHG VCT=0.5V 1.5 2 2.5 µA CT Discharge Current IDHG VCT=3.5V 0.13 0.2 0.25 µA CT Charge and Discharge Ratio RCD ICHG/IDHG 8.5 10 14.5 Linear Start Charge Current ILS VLS=1V 0.5 0.7 µA OUT1B/OUT2B High Level Voltage VOBH IOUT=10mA Vcc ~1.8 Vcc ~0.9 Vcc V OUT1B/OUT2B Low Level Voltage VOBL IOUT=10mA 0.9 1.5 V OUT1/OUT2 Low Level Voltage VOL IOUT=10mA 0.45 0.8 V FG Signal Hall Input Sensitivity VHN IHIN+,IHIN- difference voltage (include offset and hysteresis) ±10 mV FG Saturation Voltage VSAT ISINK=5mA 200 500 mV FG Leakage Current ILFG VFG=VCC 30 µA VPWM/VMIN Bias Current IPWMB/IVMINB VOSC=VPWM/VVMIN=2V 0.1 3 µA
Figure 9. Operating Diagram 1 of AM4967 (Speed Control, Note 7) When fan rotate at low speed, its lowest speed is settable by VMIN pin voltage. If not, fan motor stops. re-circulates in a lower side transistor. Therefore, as the VPWM voltage becomes lower, output ON duty becomes large.
Figure 12. Operating Diagram 4 of AM4967 (Note 8)
Figure 13. Typical Application of AM4967 (VCC=12V)
Document number: DS45176 Rev. 2 - 2 12 of 14 www.diodes.com August 2022 © Diodes Incorporated AM4967 Package Outline Dimensions Please see http://www.diodes.com/package-outlines.html for the latest version. SSOP-16 Unit: mm(inch) 3.800(0.150) 4.000(0.157) 0.200(0.008) 0.300(0.012) 7 o 0.635(0.025) BSC 7 o 0.800(0.031) 4.700(0.185) 5.100(0.201) 0.100(0.004) 0.250(0.010) 1.350(0.053) 1.750(0.069) 0.400(0.016) 5.800(0.228) 6.200(0.244) 1.270(0.050) SEE DETAIL A 1.350(0.053) 0.250(0.010) 8 o 1.550(0.061) 0.150(0.006) 0.250(0.010) R0.150(0.006) 8o R0.150(0.006) 8 o 0.650(0.026) 0.750(0.030) 0.200(0.008) 0.250(0.010) 0.020(0.001) 0.050(0.002) DETAIL A
Document number: DS45176 Rev. 2 - 2 13 of 14 www.diodes.com August 2022 © Diodes Incorporated AM4967 Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version.
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