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TLC5904PZP Fiches technique(PDF) 7 Page - Texas Instruments |
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TLC5904PZP Fiches technique(HTML) 7 Page - Texas Instruments |
7 / 27 page TLC5904 LED DRIVER SLLS391 – NOVEMBER 1999 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 Terminal Functions (Continued) TERMINAL I/O DESCRIPTION NAME NO. I/O DESCRIPTION TSENA 80 I TSD(thermal shutdown) enable. When TSENA is high, TSD is enabled. When TSENA is low, TSD is disabled. TEST1 TEST2 58 75 I TEST. Factory test terminal. TEST1 and TEST2 should be connected to GND for normal operation. THERMAL PAD package bottom Heat sink pad. This pad is connected to the lowest potential IC or thermal layer. VCCANA 45 Analog power supply voltage VCCLOG 81 Logic power supply voltage VCCLED 41 LED driver power supply voltage WDTRG 62 I WDT (watchdog timer) trigger input. By applying a scan signal to this terminal, the scan signal can be monitored by turning the constant current output off to protect the LED from damage if the scan signal stops during the constant period designed. WDCAP 42 I WDT (watchdog timer) detection time adjustment. WDT detection time is adjusted by connecting a capacitor between WDCAP and GND. When WDCAP is directly connected to GND, WDT function is disabled. In this case, WDTRG should be tied to a high or a low level. XDOWN1 60 O Shutdown. XDOWN1 is configured as open collector. It goes low when constant current output is shut down by WDT or TSD function. XDOWN2 59 O OVM comparator output. XDOWN2 is configured as an open collector. It monitors terminal voltage when constant current output is turned on. XDOWN2 goes low when this voltage is lower than the level selected by OVM latch. When BLANK is set high, the previous level is held. XENABLE 64 I DCLK enable. When XENABLE is low, data transfer is enabled. Data transfer starts on the rising edge of DCLK after XENABLE goes low. During XENABLE high, no data is transferred. XLATCH 61 I Latch. When XLATCH is high, data on the shift register goes through latch. When XLATCH is low, data is latched. Accordingly, if data on the shift register is changed during XLATCH high, this new value is latched (level latch). XOE 63 I Data output enable. When XOE is low, DOUT0–7 terminals are drived. When XOE is high, DOUT0–7 terminals go to a high -impedance state. absolute maximum ratings (see Note 1)† Logic supply voltage, VCC(LOG) – 0.3 V to 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Supply voltage for constant current circuit, VCC(LED) – 0.3 V to 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Analog supply voltage, VCCANA – 0.3 V to 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output current (dc), IO(LC) 90 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage range – 0.3 V to VCCLOG + 0.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output voltage range, VO(DOUTn), VO(BOUT) and VO(GSOUT) – 0.3 V to VCCLOG + 0.3 V . . . . . . . . . . . . . . Output voltage range, VO(OUTn) and VO(DOWNn) – 0.3 V to 18 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, Tstg –55 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous total power dissipation at (or below) TA = 25°C 4.7 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power dissipation rating at (or above) TA = 25°C 38.2m W/ °C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: All voltage values are with respect to the GNDLOG terminal. |
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