AM4962

AM4962

Document overview

• Manufacturer or author: Diodes Incorporated
• PDF pages: 13

Technical content

Features

• The Motor Speed is Controlled by PWM Pulse Directly
• Built-in Triangle Wave Circuit Without Extra Oscillation Capacitor
• Built-in Hall Bias Circuit
• Built-in Minimal Speed Setup Circuit
• Slope K* Adjustable
• Rotation Speed Indication (FG)
• Rotation or Lock State Indication (RD)
• Built-in Thermal Shutdown Circuit
• Lock Protection and Auto-Restart
• Output Current Limit * Slope K is the slope of output PWM duty vs. input PWM duty

Applications

• CPU Cooler Fan in PC
• Brushless DC Motor Driver Pin Assignments (Top View) HTSSOP-14 (Top View) SSOP-16 NOT RECOMMENDED FOR NEW DESIGN - NO ALTERNATE PART

Document number: DS43019 Rev. 1 - 3 2 of 13 www.diodes.com August 2020 © Diodes Incorporated AM4962 0 10 20 30 40 50 60 70 80 90 100 100 Max. Duty Cycle Output Duty Cycle (%) Input PWM Duty Cycle (%) Min. Duty Cycle Slope K OUT2 OUT1 VCC GND VMIN CT PWM RADJ CF HIN- FG HB RD HIN+ Hall AM4962 1µF VCC 1µF 0.47µF 1 (1) PGND 2 (3) 3 (4) 4 (5) 5 (6) 6 (7) 7 (8) 8 (9) 9 (10) 10 (11) 11 (12) 12 (13) 13 (14) 14 (15) Typical Applications Circuit (Note 1) Application 1 (Default) OUT2 OUT1 VCC GND VMIN CT PWM RADJ CF HIN- FG HB RD HIN+ Hall AM4962 1µF VCC 1µF 0.47µF 1 (1) PGND 2 (3) 3 (4) 4 (5) 5 (6) 6 (7) 7 (8) 8 (9) 9 (10) 10 (11) 11 (12) 12 (13) 13 (14) 14 (15) Application 2 (Slope K and Minimum/Maximum Duty Adjustable) Note: D2 and D3 are recommended to be used when the current in coil L1 is higher than 300mA .

Document number: DS43019 Rev. 1 - 3 3 of 13 www.diodes.com August 2020 © Diodes Incorporated AM4962 0 10 20 30 40 50 60 70 80 90 100 100 R6=100k, R1, R2, R3, R4, R5 Open R6=270k, R1, R2, R3, R4, R5 Open R1, R2, R3, R4, R5, R6 Open Output Duty Cycle (%) Input PWM Duty Cycle (%) 0 10 20 30 40 50 60 70 80 90 100 100 R5=270k, R1, R2, R3, R4, R6 Open R5=560k, R1, R2, R3, R4, R6 Open R1, R2, R3, R4, R5, R6 Open Output Duty Cycle (%) Input PWM Duty Cycle (%) 390K 560K 820K 1M 2.2M 4.7M 8.2M 100Minimum Duty Cycle (%) R5 (Ω) R1, R2, R3, R4, R6 open Typical Applications Circuit (Note 1) (Continued) Note 1 (Refer to application circuit 2 unless otherwise noted.): Adjust slope K of output PWM's duty vs. input PWM's duty 1. The default K is about 0.8 2. Adding R5 can increase K 3. Adding R6 can decrease K Adjust minimum duty of output PWM: 1. The default minimum duty of output PWM is about 20% 2. Decreasing R2 can increase minimum output PWM duty 3. Adding R5 can decrease minimum output PWM duty Minimum Duty Cycle (%) R2 (Ω) R1=15k,R3,R4,R5,R6 open 3.5k

Document number: DS43019 Rev. 1 - 3 4 of 13 www.diodes.com August 2020 © Diodes Incorporated AM4962 0 10 20 30 40 50 60 70 80 90 100 100 R3=390k, R1, R2, R4, R5, R6 Open R3=1M, R1, R2, R4, R5, R6 Open R1, R2, R3, R4, R5, R6 Open Output Duty Cycle (%) PWM (%) 0 10 20 30 40 50 60 70 80 90 100 100 R4=150k, R1, R2, R3, R4, R6 Open R4=390k, R1, R2, R3, R5, R6 Open R1, R2, R3, R4, R5, R6 Open Output Duty Cycle (%) PWM (%) Typical Applications Circuit (Note 1) (Continued) Adjust maximum duty of output PWM: 1. The default maximum output PWM duty is 100%. 2. Adding R3 can decrease maximum output PWM duty. 3. Adding R4 can increase maximum output PWM duty. Pin Descriptions Pin Number Pin Name Function HTSSOP-14 SSOP-16 1 1 OUT2 Driver output 2 — 2 NC No connection 2 3 VCC Power supply 3 4 VMIN Minimum duty setting 4 5 PWM PWM pulse Input 5 6 CF PWM filter capacitor 6 7 FG Rotation speed indicator 7 8 RD Rotation/lock state indicator 8 9 HIN+ Hall sensor input + 9 10 HB Hall sensor bias regulator 10 11 HIN- Hall sensor input - 11 12 RADJ Slope K adjustable terminal 12 13 CT Lock and rotation setting capacitor terminal 13 14 GND Ground for control circuit 14 15 OUT1 Driver output 1 — 16 PGND Power ground

Document number: DS43019 Rev. 1 - 3 5 of 13 www.diodes.com August 2020 © Diodes Incorporated AM4962 Functional Block Diagram Lock Shutdown and Auto Restart Hall Bias Thermal Shutdown Hysteresis Amp Control Circuit Triangle Wave CT VCC RADJ HB HIN+ HIN- VMIN PWM CF GND PGND OUT1 OUT2 RD FG 1 (1) Pre- driver 2 (3) 3 (4) 4 (5) 5 (6) 6 (7) 7 (8) 8 (9) 9 (10) 10 (11) 11 (12) 12 (13) 13 (14) 14 (15) (16) V+ V+ 104k 42k 90k 54k 51k 56k 93k 18k A (B) A HTSSOP-14 B SSOP-16 Truth Table (Note 2) Items IN- IN+ CF CT OUT1 OUT2 FG Mode

1 H L

L L H L L Rotation

2 L H L H Off PWM off

3 H L

H Off L L Rotation Recirculate

4 L H L Off Off PWM off

5 H L

6 L H Off H Off

Note 2: VCF(H)=5V, VCF(L) =1V, VCT(H)=5V, VCT(L) =0

Document number: DS43019 Rev. 1 - 3 6 of 13 www.diodes.com August 2020 © Diodes Incorporated AM4962 Absolute Maximum Ratings (Note 3) Symbol Parameter Value Unit VCC Supply Voltage 18 V IOUT Output Current 1.0 A VOUT Output Voltage 18 V IHB HB Output Current 10 mA VRD RD Output Voltage 18 V VFG FG Output Voltage 18 V IRD RD Output Current 10 mA IFG FG Output Current 10 mA PD Power Dissipation SSOP-16 0.8 W HTSSOP-14 1.1 W TSTG Storage Temperature Range -55 to +150 °C θJA Thermal Resistance (Junction to Ambient) SSOP-16 156 °C/W HTSSOP-14 114 ESD ESD (Human Body Model) 2000 V ESD ESD (Machine Model) 250 V Note 3: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stres s ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Condi tions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Symbol Parameter Min Typ Max Unit VCC Supply Voltage 3.5 12 16 V VIN+ Hall Input Voltage + (Note 4) 0.2 — 3 V VIN- Hall Input Voltage - (Note 4) 0.2 — 3 V VPWM PWM High Level Voltage — — VCC-1 V TA Ambient Temperature -30 — +90 °C Note 4: Hall input voltage range includes the amplitude of signal.

Document number: DS43019 Rev. 1 - 3 7 of 13 www.diodes.com August 2020 © Diodes Incorporated AM4962 Electrical Characteristics (VCC=12V, TA=+25°C, unless otherwise specified.) Symbol Parameter Conditions Min Typ Max Unit IQ1 Quiescent Current VCT=0 10.18 15 18.76 mA IQ2 VCT=5V 5.38 8 10.55 VSATH Output Saturation Voltage at High Side ISOURCE=200mA — 1.0 1.17 V VSATL Output Saturation Voltage at Low Side ISINK=200mA — 0.2 0.3 V fOSC CPWM Frequency — 18 25 32 kHz VCFH CF High Level Voltage VPWM=0 3.2 3.6 3.75 V VCFL CF Low Level Voltage VPWM=5 1.83 1.95 2.15 V VMIN VMIN Voltage — 3.4 3.7 4.0 V VADJ RADJ Pin Voltage VPWM=0 3.6 3.8 4.4 V VHYS Hall Input Hysteresis — — ±10 ±20 mV VHB Hall Bias Voltage IHB=5mA 1.1 1.25 1.4 V VCTH CT High Level Voltage — 3.55 3.7 3.88 V VCTL CT Low Level Voltage — 1.55 1.7 1.85 V ICHG CT Charge Current — 1.5 2 2.85 µA IDHG CT Discharge Current — 0.14 0.2 0.285 µA RCD CT Charge and Discharge Ratio ICHG/IDHG 8.5 10 14.5 — VFGL FG Output Low Level Voltage IFG=5mA — 0.2 0.3 V ILFG FG Leakage Current VFG=12V — — 30 µA VRDL RD Output Low Level Voltage IRD=5mA — 0.2 0.3 V ILRD RD Leakage Current VRD=12V — — 30 µA

Document number: DS43019 Rev. 1 - 3 8 of 13 www.diodes.com August 2020 © Diodes Incorporated AM4962 4 6 8 10 12 14 16 18 TA=25 o C IQ1(VCT=L) IQ2(VCT=H) Quiescent Current (mA) Supply Voltage (V) -50 -25 0 25 50 75 100 125 VCC=12V IQ1(VCT=L) IQ2(VCT=H) Quiescent Current (mA) Ambient Temperature ( O 0 100 200 300 400 500 600 700 800 900 1000 0.0 0.4 0.8 1.2 1.6 2.0 VSATH1 VSATH2 VSATL1 VSATL2 Output Saturation Voltage (V) Output Current (mA) VCC=12V, TA=25 o C -20 0 20 40 60 80 100 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Allowable Power Dissipation (W) Ambient Temperature ( O Package: HTSSOP-14 -20 0 20 40 60 80 100 120 0.0 0.2 0.4 0.6 0.8 1.0 1.2 Allowed Power Dissipation (W) Ambient Temperature ( O Package: SSOP-16 Performance Characteristics Quiescent Current vs. Ambient Temperature Quiescent Current vs. Supply Voltage Output Saturation Voltage vs. Power Dissipation vs. Output Current Ambient Temperature Power Dissipation vs. Ambient Temperature

Document number: DS43019 Rev. 1 - 3 9 of 13 www.diodes.com August 2020 © Diodes Incorporated AM4962 Operating Diagram VPWM adjustable voltage fOSC=25kHz Low Speed PWM Variable High Speed VMIN VH=3.6V VL=2.0V All parameters are tested under VCC=12V

Document number: DS43019 Rev. 1 - 3 10 of 13 www.diodes.com August 2020 © Diodes Incorporated AM4962

Ordering Information

PackingPackageProduct Name TR : Tape & Reel GH : HTSSOP-14 G1 : Green GS : SSOP-16 RoHS/Green Blank : Tube Package Temperature Range Part Number Marking ID Packing HTSSOP-14 -30 to +90°C AM4962GH-G1 AM4962GH-G1 Tube AM4962GHTR-G1 AM4962GH-G1 Tape & Reel SSOP-16 AM4962GS-G1 AM4962GS-G1 Tube AM4962GSTR-G1 AM4962GS-G1 Tape & Reel

Document number: DS43019 Rev. 1 - 3 11 of 13 www.diodes.com August 2020 © Diodes Incorporated AM4962 Package Outline Dimensions (All dimensions in mm(inch)) Please see http://www.diodes.com/package-outlines.html for the latest version. (1) Package Type: HTSSOP-14 6.350(0.250) 6.550(0.258) 1.470(0.058) 1.570(0.062) 1.450(0.057) 1.550(0.061) 0.750(0.030) 0.850(0.033) 0.650(0.026) BSC 1.300(0.051) BSC 6.200(0.244) 6.600(0.260) 0.340(0.013) 0.540(0.021) 1.200(0.047) MAX 0.050(0.002) 0.200(0.008) 0.900(0.035) 1.050(0.041) 4.300(0.169) 4.500(0.177) SEE DETAIL A 0.250(0.010) BSC R0.090(0.004) MIN R0.090(0.004) MIN 0.200(0.008) MIN 0.450(0.018) 0.750(0.030) 1.000(0.039) REF DETAIL A Note: Eject hole, oriented hole and mold mark is optional. 0.100(0.004) 0.150(0.006) 0.100(0.004) 0.190(0.007) BASE METAL Φ Φ

Document number: DS43019 Rev. 1 - 3 12 of 13 www.diodes.com August 2020 © Diodes Incorporated AM4962 Package Outline Dimensions (All dimensions in mm(inch)) (Continued) Please see http://www.diodes.com/package-outlines.html for the latest version. (2) Package Type: SSOP-16 3.800(0.150) 4.000(0.157) 0.200(0.008) 0.300(0.012) 0.800(0.031) 0.635(0.025) BSC 0.100(0.004) 0.250(0.010) 1.350(0.053) 1.750(0.069) 0.400(0.016) 1.270(0.050) 4.700(0.185) 5.100(0.201) 5.800(0.228) 6.200(0.244) 0.650(0.026) 0.750(0.030) 0.200(0.008) 0.250(0.010) 1.350(0.053) 1.550(0.061) 0.020(0.001) 0.050(0.002) R0.150(0.006) R0.150(0.006) 0.250(0.010)SEE DETAIL A 0.150(0.006) 0.250(0.010) Φ DETAIL A Note: Eject hole, oriented hole and mold mark is optional.

Document number: DS43019 Rev. 1 - 3 13 of 13 www.diodes.com August 2020 © Diodes Incorporated AM4962 IMPORTANT NOTICE DIODES INCORPORATED 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 assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document 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 Diodes 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, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out 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 names 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 mul tiple 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 system s 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 devices 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 pr ovided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated 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 © 2020, Diodes Incorporated www.diodes.com