4.2.1.4 Periodendauer
Sie stellen die Periodendauer in µs in der Hardware-Konfiguration ein. Der Wertebereich ist abhängig von der Verwendung der Funktion High-Speed-Ausgang:
High-Speed-Ausgang | Wertebereich der Periodendauer
Aktiviert | 10 ... 85000000 µs = 10 µs ... 85 s
Deaktiviert | 100 ... 85000000 µs = 100 µs ... 85 s
PWM Duty Cycle In a Type B implementation the fan will run at minimum RPM for all non-zero PWM duty cycle values less than minimum duty cycle and turn off the motor at 0% PWM duty cycle. See Figure 5. 15 Fan Speed Control Figure 5 Type B Operation, Stay On at Minimum RPM, Off at 0% RPM Speed vs. PWM Duty cycle %of full speed 35 The fan stays on at minimum speed for 30 PWM duty cycle values below the 25 minimum PWM Example Min. duty cycle, and PWM shuts off at 0% 20 PWM duty cycle Example Min. 15
Noctua PWM specifications white paper Scope of this paper ThescopeofthiswhitepaperistoprovideadetailedtechnicaldocumentationofthePWM (Pulse Width Modulation) speed control features of Noctua’s 4-pin PWM fans.
80 PWM0DL (95h) Function related to: PWM0 PWM0 Duty bit 7~0 PWM0DL 95.7~0 R/W 00 PWM1DH (96h) Function related to: PWM1 PWM1 Duty bit 15~8 PWM1DH 96.7~0 R/W 80 PWM1DL (97h) Function related to: PWM1 PWM1 Duty
EN/PWM rising tLED from ILED= 175 mA 1.5 ms shutdown ILED= 80 mA 1.3 TP1 Turn−On time, EN/PWM rising tLED ILED= 175 mA 600 ns TP2 Turn−Off time, EN/PWM fallingLED I ILED= 175 mA 400 ns I = 80 mA 300 LED T
MOSFET Trigger Switch Drive Module 16.5mm/0.65in 36.5mm/1.4in R1 R3 PWM Q2 LED1 LED2 LED3 GND Working Voltage DC 5V-36V Continuous Current 15A Maximum Current and Power 30A,400W The Trigger Source Digital high-low (DC3.3V-20V) PLC Interfaces: YES Work Temperature -45°C to +85°C Micro Controller IO Port YES PWM Signal 0-20KHZ
VIN AL5809 IN 1 X Y W X OUT 2 PWM_DIM (ZXMN6A11Z) a) PWM Dimming by External MOSFET Recommended PWM Frequency and Dimming Range PWM Frequency (Hz) Duty Cycle (%) Min Max 100 5 95 200 10 90
1 0 1 0 1 0 0 1 FORWARD Full Bridge y 1 M W P 1 1 1 1 1 0 0 1 1 0 BACK Full Bridge e d M 1 1 0 1 1 pwm1 pwm1 pwm2 pwm2 PWM1 ->left Two Half 2 PWM2->right Bridges M W / M 1 1 1 1 1 pwm1 pwm1 pwm2 pwm2 PWM1 ->left Two Half W PWM2 ->right Bridges P Note: The DIR signal is internally synchronized with the
= 1.2V ) IN 80 µ % 70 e250 ( 60 VIN 0.8V V = 1.2V d c IN o225 e 50 M VOUT= 3.3V c 40 M f P200 E 30 PWM / PFM I 20 175 PWM ONLY 10 0 150 -40 -25 -10 5 20 35 50 65 80 0.01 0.1 1 10 100 1000 OUT (mA) Ambient Temperature (°C) FIGURE 2-2: V OUT Q I vs. Ambient FIGURE 2-5: 3.3V V PFM / PWM OUT Temperature in PWM Mode. Mode Efficiency vs. I OUT . 600 100 VOUT= 5.0V VIN 2.5V V OUT= 5.0V 90 500 V OUT= 3.3V 80 400 ) 70 VIN 1.2V VIN 1.8V A ( m c 60 T300 V OUT= 2.0V n 50 O c 40 I200 f E 30 20 PWM / PFM 100 PWM ONLY
PWM0 PWM0 PWM0 PWM0 PWM0 PWM0 PWM0 PWM0 [7] [6] [5] [4] [3] [2] [1] [0] Default 1 0 0 0 0 0 0 0 6.3.5 PCS1 - Frequency Prescaler 1 PSC1 is used to program the period of the PWM output. The period of BLINK1
wird ;PORTA, 1 ;Lade Speicherbereich 0 aus EEPROM ;PORTA, 2 ;Lade Speicherbereich 1 aus EEPROM von PWM1 , PWM2 ;PORTA, 3 ;Lade Speicherbereich 2 aus EEPROM und PWM3 , PWM4 angesteuert ;PORTA, 4 ;Lade Speicherbereich 3 aus EEPROM ;PORTA, 5 ;Lade Speicherbereich 4 aus EEPROM PWM5 wird nur für 5-Phasen
wird ;PORTA, 1 ;Lade Speicherbereich 0 aus EEPROM ;PORTA, 2 ;Lade Speicherbereich 1 aus EEPROM von PWM1 , PWM2 ;PORTA, 3 ;Lade Speicherbereich 2 aus EEPROM und PWM3 , PWM4 angesteuert ;PORTA, 4 ;Lade Speicherbereich 3 aus EEPROM ;PORTA, 5 ;Lade Speicherbereich 4 aus EEPROM PWM5 wird nur für 5-Phasen
nachgedacht Ich würde das nicht mit zwei GPIOs und Transistoren improvisieren, sondern den µC nur das 1-kHz-PWM erzeugen lassen und damit einen analogen Umschalter zwischen +12 V und −12 V ansteuern. Empfohlene Schaltung +12 V │ ┌─────┴─────┐ µC PWM, 1 kHz ──────►│ SEL │ │ TMUX6219 ├───── 1 kΩ / 1 % ───── CP
2.4 PWM Control Input Signal
The following requirements are measured at the PWM (control) pin of the fan cable connector:
PWM Frequency: Target frequency 25 kHz, acceptable operational range 21 kHz to 28 kHz
2.1.4 PWM Control Input Signal
The following requirements are measured at the PWM (control) pin of the fan cable connector see Figure 7 and Table 1:
PWM Frequency: Target frequency 25 kHz, acceptable operational
voltage V IN 38 V L Inductor 4.7 10 µH C I Input capacitor 1 µF C O Output capacitor 1 10 µF FPWM PWM dimming signal frequency 5 100 kHz D PWM PWM dimming signal duty cycle 1% 100% T Operating junction temperature –40 125 °C J 6.4 Thermal Information TPS92360 THERMAL METRIC (1) DCK (SC70) UNIT 5 PINS
alternates per long press. * * Everything runs off the 32.768 kHz ULP oscillator (20 MHz osc stays off). * PWM: TCA0 with PER = 127 -> 256 Hz, 128 levels. While the LED is off the CPU * sits in POWER-DOWN (~0.1 uA, wake on PA1 edge), while on in IDLE so the PWM * keeps running. The PIT (7.8 ms tick, CYC256 of
motor
10 V -> n = max
1 V -> n = min
< V -> n = 0
Safe start-up at Unom -30 % from 4 V Unom
Speed via PWM 1-10 kHz
Setting of values via temperature controller
100 % PWM -> n = max
10 % PWM -> n = min
10 % PWM -> n = 10
Safe start-up at Unom -30 % from 40 % PWM
T<10 °C -> n = 0
T=45 °C -> n = max
UN +48
Drehzahl
1-10V
2
1
10V -> n = max
1V -> n = min
<1V -> n = 0
CON10 L
CON11 N
CON12 PE
3 +10V
2 0-10V/PWM
4 Tach
1 GND
Imax=10mA
47k
1uF
0V
0-10V
Isink_max.10mA
47
15V
12V
100% PWM -> n = max
10% PWM -> n = min
<10% PWM -> n = 0
Nr. Anschl. Bezeichnung Farbe Funktion / Belegung
CON10 L braun Netzanschluss
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