T6817 ATMEL Corporation, T6817 Datasheet
T6817
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T6817 Summary of contents
Page 1
... Dual Triple DMOS Output Driver with Serial Input Control T6817 1. Introduction The T6817 is a fully-protected universal driver interface designed in 0.8-µm BCDMOS technology used to control different loads by a microcontroller in automo- tive and industrial applications. Each of the 3 high-side and 3 low-side drivers is capable of driving currents up to 600 mA ...
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... Features • Row connector pins for external loads switched by low- or high-side drivers • Easy adaptation of loads directly on the T6817 application board • Direct switch of loads to V • Forward/reverse rotation of DC motors by full-bridge application • Paralleling of outputs for powerful applications • PC adaptation via standard SUB-D connectors (plug 3 or plug 4, see • ...
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... Figure 2-2. T6817 Development Board Schematic 4783B–AUTO–11/05 LM2936 U1 200 R6 HS3 D6 R13 1k HS2 HS1 LS3 LS2 LS1 T6817 3 ...
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... Figure 2-3. ATAB6817 Basic Application Board Component Placement; Top Side, Top View Figure 2-4. ATAB6817 Basic Application Board Top Side, Top View T6817 4 4783B–AUTO–11/05 ...
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... Figure 2-5. ATAB6817 Basic Application Board Bottom Side, Top View (as if PCB were transparent) 4783B–AUTO–11/05 T6817 5 ...
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... The T6817 development board includes the software T6817. The user can also download the software from the company’s website, www.atmel.com. After the download, the installation pro- cess can be launched by starting the downloaded .exe file. The T6817.exe file is transferred to a user-defined directory (for example, D:\T6817), and the system files are then transferred to the system directories, finishing the installation ...
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... IC reports the previous condition, that is, the INH bit register is set in the output. After the second dataword, the INH bit disappears. 1. Set inhibit switch on 2. Select Send Data Loop 3. Select load to operate 3.3 Ordering Information Please contact your appropriate Atmel Sales Office or Distributor. Figure 3-2. Software User Interface 4783B–AUTO–11/05 T6817 7 ...
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... H-bridge applications the open-load detection works in a well-defined way. If, for example, an open load at motor M1 should be detected, HS1 or HS2 has to be switched on, while the diametrical low-side output register LS2 and LS1, respectively, has to be evaluated. T6817 8 Functions of the Serial Interface Register Bits Input Register ...
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... Configuration Table of the Required Datawords to Set Certain Functions of the Circuit (see Figure 4-1 on page Bit 15 Bit 14 Bit 13 Bit 6 (SI) (SCT) (OLD) (HS3) H and the programmed dUV 10) Bit 5 Bit 4 Bit 3 Bit 2 (LS3) (HS2) (LS2) (HS1 T6817 Bit 1 Bit 0 (LS1) (SRR ...
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... Input Register 3 Output Register INH Fault Detect 8 LS3 V S T6817 10 HS2 HS1 14 16 Fault Fault Detect Detect Serial interface n ...
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... In applications with a high number of loads, a straightforward parallel operation of the T6817 via the microcontroller is possible. Separate control of the T6817's serial data interface is provided by chip select pins CS1 - CS4 (for the function of the serial data interface, please refer to the datasheet). For simultaneous operation of the serial data interfaces (that is, CS1 through CS4 are active at the same time), each of the data outputs (DO) needs to communicate with a dedicated micro- controller input pin ...
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... In applications with a larger number of loads, there is a second possibility to connect several T6817 to the microcontroller. The daisy-chain arrangement requires only one CS line, the data signal is handed over step by step from one T6817 to the next as long as the CS signal stays low quite evident that such advantage is purchased with slower reaction times, as several programming cycles are needed to load the desired setting into each T6817 ...
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... protection VCC VS VCC Control logic 19 UV protection GND GND Reset 10 VCC GND 11 GND Fault Detect Thermal 13 protection GND 20 17 LS1 T6817 VS BYT41D V BATT 13V + VCC VCC ...
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... It is strongly recommended that the IC be connected to a cooling area on-board. All thermal pins (4 GND pins) are directly connected to the cooling area. ment with the SSO20 package of the T6817. The increase or decrease of the cooling area extension has to be done according to the required power dissipation (see ...
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... Overload Considerations 6.1 Driver Output Shorted to V During normal operation, the T6817 is protected against short circuits by an overcurrent limita- tion. However, some attention has to be turned to certain states of abnormal operating conditions that might occur in practice. In particular, we have to consider the case of a high-side ...
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... Figure 6-3. The clamping structures at the output stages limit the voltage peak and provide a path for the current after switching off. The maximum inductive shutdown energy for T6817 is specified as 15 mJ. This value applies for both low-side and high-side outputs. The energy W inductor L during the switched-on state can be calculated with the following formula: ...
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... Figure 6-4. Figure 6-5. 4783B–AUTO–11/05 Inductive Pulse at Low-side Output; Channel 1: Gradient Channel 2: Gradient of V out mJ. Please note that the maximum pulse energy for T6817 Principal Clamping Structure at High-side Output V S T6817 T6817 , Pulse Energy: out HSx 17 ...
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... This only means that during long periods of inhibit mode, the IC's supply voltage could increase continuously – until finally the maximum supply voltage limit of 40V would be exceeded and the IC could be damaged. The T6817 therefore features a discharger circuit that avoids such unwanted effects discharged via an integrated resistor until V Figure 6-6 ...
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... Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. © Atmel Corporation 2005. All rights reserved. Atmel marks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Atmel Operations Memory ...