PWM Controlled Fan

TUV UL CE certificate 80x80x25mm dc brushless cooling fan axial flow fan 8025 80x80x25 mm 0.71-1.25 m3/min Material Frame: Plastic PBT 94V0 Impellen Plastic PBT 94V0 Lead Wire: AWG26 "+" Red "-" Black Standard UL 1007 Option: Signal output Bearing: Ball bearing or Sleeve bearing Model Rated Voltage (DCV) Operating Voltage (DCV) Rated input (W) I Rated Current (A) Operating Temperature Storage Temperature Speed (RPM) MaK Air Flow (CFM) Max, Aire Pressure (mmHQ) | Noise (DB)

CHA4012DB-MA-O(E) 40X40X20 mm 0.161-0.351 m3/min Material Frame: Plastic PBT 94V0 Impellen Plastic PBT 94V0 Lead Wire: AWG26 "+" Red "-" Black Standard UL 1007 Option: Signal output Bearing: Ball bearing or Sleeve bearing Model Rated Voltage (DCV) Operating Voltage (DCV) Rated input (W) Rated Current (A) Operating Temperature Storage Temperature CQ Speed (RPM) Max, Air Flow (CFM) Max, Aire Pressure (mm HQ) Noise (DB) Bearing Type Weight (G) CHA4012A 12 7-13.8 1.2 0.1 -10-70

Pulse-width modulation Pulse-width modulation (PWM) is a common method of controlling computer fans. A PWM-capable fan is usually connected to a 4-pin connector (pinout: Ground, +12 V, sense, control). The sense pin is used to relay the rotation speed of the fan and the control pin is an open-drain or open-collector output, which requires a pull-up to 5 V or 3.3 V in the fan. Unlike linear voltage regulation, where the fan voltage is proportional to the speed, the fan is

CH1703VFS 17x17x3 mm 0.022 m3/min Material Frame: Plastic LCP 94V0 Impellen Plastic LCP 94V0 Lead Wire: AWG26 "+" Red "-" Black Standard UL 1007 Option: Signal output Bearing: Sleeve bearing Specifications Model Rated Voltage (DCV) Operating Voltage (DCV) Rated input (W) Rated Current (A) Operating Temperature (°C) Storage Temperature (°Q Speed (RPM) Max. Air Flow (CFM) Max, Aire Pressure (mmHQ) Noise (DB) Bearing Type Weight I (g) CH1703VFS 3 1.9-3.5 0.18 0.06 -10-70 -40-70

CH1703VFS 17x17x3 mm 0.022 m3/min Material Frame: Plastic LCP 94V0 Impellen Plastic LCP 94V0 Lead Wire: AWG26 "+" Red "-" Black Standard UL 1007 Option: Signal output Bearing: Sleeve bearing Model Rated Voltage (DCV) Operating Voltage (DCV) Rated input (W) Rated Current (A) Operating Temperature (°C) Storage Temperature (°Q Speed (RPM) Max. Air Flow (CFM) Max, Aire Pressure (mmHQ) Noise (DB) Bearing Type Weight (g) CH1703VFS 3 1.9-3.5 0.18 0.06 -10-70 -40-70 13000 0.022 1.04

CHA3005BBSOA(E) 30x30x10 mm 0.061-0.12 m3/min Material Frame: Plastic PBT 94V0 Impellen Plastic PBT 94V0 Lead Wire: AWG26 "+" Red "-" Black Standard UL 1007 Option: Signal output Model Rated Voltage (DCV) Operating Voltage (DCV) Rated input (W) Rated Current (A) Operating Temperature (°C) Storage Temperature (°Q Speed (RPM) May Air Flow (CFM) Max. Aire Pressure (mmH20) Noise (DB) Bearing Type Weight (g) CHA3005A 5 3-6.5 0.25 0.05 -10-70 -40-70 5000 2.15 1.85 15 SB 8 CHA3012A

CHA8012CS 80x80x25 mm 0.71-1.25 m3/min Material Frame: Plastic PBT 94V0 Impellen Plastic PBT 94V0 Lead Wire: AWG26 "+" Red "-" Black Standard UL 1007 Option: Signal output Bearing: Ball bearing or Sleeve bearing Model Rated Voltage (DCV) Operating Voltage (DCV) Rated input (W) I Rated Current (A) Operating Temperature Storage Temperature Speed (RPM) MaK Air Flow (CFM) Max, Aire Pressure (mmHQ) | Noise (DB) Bearing Type Weight (g) CHA8012A 12 6-13.8 1.08 0.09 -10-70 -40-70

8038 80x80x25 mm 0.71-1.25 m3/min Material Frame: Plastic PBT 94V0 Impellen Plastic PBT 94V0 Lead Wire: AWG26 "+" Red "-" Black Standard UL 1007 Option: Signal output Bearing: Ball bearing or Sleeve bearing Model Rated Voltage (DCV) Operating Voltage (DCV) Rated input (W) I Rated Current (A) Operating Temperature Storage Temperature Speed (RPM) MaK Air Flow (CFM) Max, Aire Pressure (mmHQ) | Noise (DB) Bearing Type Weight (g) CHA8012A 12 6-13.8 1.08 0.09 -10-70 -40-70 2100 25

CHC35XXDDD-XX 35x35x10mm 0.118 -0.184M m3/min Material Frame: Plastic PBT 94V0 Impellen Plastic PBT 94V0 Lead Wire: AWG26 "+" Red "-" Black Standard UL 1007 Option: Signal output Bearing: Ball bearing or Sleeve bearing MODELS Rated Voltage Operating Voltage Rated Input Rated Current Speed Maximum Air Flow Maximum Air Pressure Noise A O • DCV DCV W A RPM M3/Min(CFM) mmH20 DB CHC3505A 5 3.0-6.5 0.20 0.04 4500 0.118 1.32 22.0 CHC3512A 12 6.0-13.2 0.48 0.04 4500 0.118 1.32 22.0

DC burshless fans with High air flow and high air pressure are mainly used for server PWM (Pulse Width Modulation) or modulation with the width of an impulse, is a widespread term in the world of electrical engineering. It has a broad range of application, like in the field of telecommunications, audio equipment, servo motors, etc. Interesting for us enthusiasts is the application of PWM in voltage regulation. If you’ve followed our recent blog article on MOSFETs and VRMs,

A172XX-MXX 172x150x50.8 mm 5.811-9.201 m3/min Material Frame: Die-Cast aluminum Impellen Plastic PBT 94V0 Lead Wire: AWG26 "+" Red "-" Black Standard UL 1007 Option: Signal output Bearing: Two ball bearing Weight: APPROX.780g(27.51oz) Model Rated Voltage (DCV) Operating Voltage (DCV) Rated I input (W) Rated I Current (A) Operating Temperature Storage Temperature Speed (RPM) Max, Air Flow (CFM) Max Aire Pressure (mmH?0) Noise (DB) Bearing Type Weight (g) CHA17212A | 12 8-13.8

CHD4012FB-A 40X40X28 mm 0.209-0.690 m3/min 4.05-30.14 mm-H2O Material Frame: Thermoplastic PBT of UL 94V-O Impellen Thermoplastic PBT of UL 94V-O Bobbin: Thermoplastic PBT of UL 94V-O Lead Wire: AWG26, Red Wire Positive(+) Black wire Negative(-) Model Rated Voltage (DCV) Operating Voltage (DCV) Rated input (W) Rated Current (A) Operating Temperature (°C) Storage Temperature CQ Speed (RPM) Max, Air Flow (CFM) Max, Aire Pressure (mmHQ) Noise (DB) Bearing Type Weight (g)

CHA3812DB-O 38x38x28 mm 0.176-0.556 m3/min Material Frame: Thermoplastic PBT of UL 94V-O Impellen Thermoplastic PBT of UL 94V-O Bobbin: Thermoplastic PBT of UL 94V-O Lead Wire: AWG26, Red Wire Positive(+) Black wire Negative(-) Model Rated Operating Voltage (DCV) Rated Rated current Operating Temperature Storage Temperature (°C) Speed (RPM) Max Air Flow (CFM) Max. Aire Pressure (mmHQ) Noise (DB) Bearing Type Weight (g) voltage(DCV) power (W) (A) CHA3812A 12 7-13.2 0.6 0.05

8038 80x80x38 mm 0.71-1.25 m3/min Material Frame: Plastic PBT 94V0 Impellen Plastic PBT 94V0 Lead Wire: AWG26 "+" Red "-" Black Standard UL 1007 Option: Signal output Bearing: Ball bearing or Sleeve bearing Model Rated Voltage (DCV) Operating Voltage (DCV) Rated input (W) I Rated Current (A) Operating Temperature Storage Temperature Speed (RPM) MaK Air Flow (CFM) Max, Aire Pressure (mmHQ) | Noise (DB) Bearing Type Weight (g) CHA8012A 12 6-13.8 1.08 0.09 -10-70 -40-70 2100 25