EPC700-CSP6-A

epc700/epc702 24V/50mA General-Purpose Output-Driver General Description Features The epc70x family is a general purpose low-side power switch for 24V interfaces. A high-side switch is also available, please refer to the separate data sheet of epc701/703. The device is very easy to use and capable to drive a load of 50mA at 30VDC. If a higher driving current is necessary or if the output voltage shall be higher than 30VDC, these chips can be used to drive an external power transistor. In this mode of operation, the external transistor is fully protected against over-current by the epc chip.       Low-side power switch Driving capability without external transistor 50 mA/30VDC Programmable short-circuit detection delay-time and recovery time Static (epc700) or flashing (epc702) indication of the over-current status Self-healing output mode Available in CSP6 package with very small footprint. If the current through the external load exceeds a specified Applications threshold during a longer time period than a predefined time, the output is turned off to protect the output switch. The switch is  PLC turned on again after a predefined off-time, thus enabling the load  Sensors again in a self-healing mechanism. The over-current information is  Controllers indicated on the STATUS pin. epc700 and epc702 are easy to use and reduce the need of external components to the minimum, thus saving pcb space and money. Functional Block Diagram VDD Configuration registers ISource Control logic IN OUT Isink GND Over-current delay / release STATUS SENS + Over current sense – GND + ref GND © 2014 ESPROS Photonics Corporation Characteristics subject to change without notice GND 1 RSENS GND Datasheet epc700_702 - V2.7 www.espros.ch epc700/epc702 Absolute Maximum Ratings (Note 1) Recommended Operating Conditions Min. Max. Units Power Supply Voltage VDD -0.3 to +36.0 V (Note 2) Power Supply Voltage (VDD) 9.6 30 V Maximum Power Dissipation 100mW Storage Temperature Range (TS) -40°C to +85°C Operating Temperature (TO) -40° +85° C Humidity (non-condensing) +5 +95 % Lead Temperature solder, 4 sec. (TL) +260°C Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Recommended operating conditions indicate conditions for which the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifica tions and test conditions, see Electrical Characteristics. Note 2: Supply voltages up to 36 Volts may be present for 10 seconds only. Note 3: This device is a highly sensitive CMOS amplifier with an ESD rating of JEDEC HBM class 1C (>1kV). Handling and assembly of this device should only be done at ESD protected workstations. Electrical Characteristics VDD = 9.6V < VDD < 30V, -40°C < TA < +85°C Symbol Parameter Conditions/Comments Values Min. VDD ΔVDD Supply Voltage Typ. 9.6 Max. 30 V Ripple on Supply Voltage Peak-Peak IDD Supply Current no load VOUT Output Voltage VSat Output Saturation Voltage @50mA output current ISENS Sens Current Current trigger threshold -50 VSENS Current Sens Voltage Over-current trigger threshold voltage (by using an external power switch) 0.18 Short Circuit Peak Current Initial current during a short circuit ( 100 V/ms 200 μs 30 nF Connection Diagrams GND IN IN Top View 3 6 2 GND 15 1 SENS 8 Top View OUT 7 12 4 11 5 10 6 9 VDD 14 SENS 13 OUT 5 VDD 16 STATUS 1 6-Pin Chip Scale Package (CSP) 2 3 STATUS 4 16-Pin QFN Package Note: For sampling only. Limited quantities. Please inquire. 6-Pin CSP 16-Pin QFN Pin Name Description 1 8 GND 2 7 IN 3 5 STATUS 4 16 VDD 5 14 SENS Input either to switch internal/external mode or to measure the voltage drop on an external shunt resistor to detect over-current 6 13 OUT Output n/a 1-4, 6, 9-12, 15 NC Negative power supply pin Input from the controller Output status signal to the controller Positive power supply pin Not connected. Connect these pins to GND. PIN Connections QFN16-VEED1VN4 LST 03.08.2010 Page 1 File: This document is confidential and protected by law and international trades. It must not be shown to any third party nor be copied in any form without our written permission . © 2014 ESPROS Photonics Corporation Characteristics subject to change without notice 3 Datasheet epc700_702 - V2.7 www.espros.ch epc700/epc702 Functional Description Normal Operation During typical operation the OUT follows the IN as shown in Figure 1. As long as the output current does not exceed the current threshold, OUT is stable ON and STATUS is stable HIGH-Z. The delay from IN to OUT is defined as t ON and tOFF for the rising and the falling edge respectively. IN 0 OUT (without HIGH-Z external Transistor) V Sat OUT (with V external Transistor) Sat VDD toff ton SHORT 0 Vth sens SENS 0 STATUS HIGH-Z epc700 STATUS HIGH-Z epc702 Figure 1: Normal operation Please note that the status of the pin OUT is dependent whether the chip is operated with or without external driver transistor. In the subse quent diagrams, the version with external driver transistor is shown only. Over-current Sequence A short on the load side will lead to an over-current through OUT. If an over-current stays longer than the time t del and text, OUT is turned off as shown in the figure below. At the same time STATUS changes its state to indicate an over-current situation to an external controller. STATUS can also be used to drive directly an indicator LED due to its 10mA driving capability. epc700 delivers a constant on-signal, whereas epc702 has a flashing output. IN 0 OUT 0 SHORT 0 Vth sens SENS 0 text STATUS epc700 tdel tLED HIGH-Z tLED STATUS HIGH-Z epc702 tLED Figure 2: Short circuit detection Note: The parameter text used in this paper is described in Figure 7. LST Timing diagram operation mode epc700 05.01.2011 Page 1 File: This document is confidential and protected by law and international trades. It must not be shown to any third party nor be copied in any form without our written permission . © 2014 ESPROS Photonics Corporation Characteristics subject to change without notice 4 Datasheet epc700_702 - V2.7 www.espros.ch epc700/epc702 Current Peak at OUT A short current peak when OUT is turned on, typically generated by a capacitive load, could trigger the short-circuit protection logic. However, if the current peak is shorter than text plus tdel, the over-current peak will be ignored. Make sure that the energy drawn by such a current peak does not destroy the internal/external output transistor. IN OUT HIGH-Z STATUS Vth sens SENS text