Electronic Components Datasheet Search |
|
SA56202TW Datasheet(PDF) 11 Page - NXP Semiconductors |
|
SA56202TW Datasheet(HTML) 11 Page - NXP Semiconductors |
11 / 24 page 9397 750 12772 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. Preliminary data sheet Rev. 01 — 19 July 2004 11 of 24 Philips Semiconductors SA56202 One-chip motor driver where NPP indicates the number of pole pairs of the motor. FG has an open-drain output for easy interfacing to 3 V and 5 V logic. 7.7 Sled motor driver Two current-steering PWM channels are available to drive a stepper motor. Per channel an external sense resistor Rsense is used that is connected to ground. A peak-current control loop is implemented that modulates the duty cycle of the PWM signal. See Figure 9. The clock generator has a nominal frequency of fosc/256 = 70 kHz. See Figure 10 for the transfer function from input voltage VVINSLD to output current at a typical Rsense of 0.5 Ω. Input-to-output transconductance gain can be scaled down by connecting an external resistor Rext in series with the input VINSLD. Both limit current and transconductance gain are related to Rsense in the following way: Transconductance gain, Limit current, Fig 9. Peak-current control architecture of stepper motor driver. Fig 10. Transfer function of stepper motor driver. Σ 001aaa435 M R S Q CLOCK 70 kHz LOGIC DRIVE DRIVER A VINSLD Rsense IO Rext 47 k Ω + − 47 k Ω VVINREF input amplifier VVINREF 001aaa436 VVINSLD − VVINREF (V) −1 A +1 A/V +1 A/V 1 A IOUT (A) dead zone 30 mV −30 mV I o V in -------- 1 2R sense × ------------------------ = I LIM 1V 2R sense × ------------------------ = |
Similar Part No. - SA56202TW |
|
Similar Description - SA56202TW |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |