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BTS 4300SGA 1 Overview 3 2 Block Diagram 5 3 3.1 3.2 3.3 Pin Configuration 6 Pin Assignment 6 Pin Definitions and Functions 6 Voltage and Current Definition 7 4 4.1 4.2 4.3 General Product Characteristics 8 Absolute Maximum Ratings 8 Functional Range 9 Thermal Resistance 9 5 5.1 5.2 5.3 5.4 Power Stage 10 Output ON-State Resistance 10 Turn ON / OFF Characteristics 10 Inductive Output Clamp 11 Electrical Characteristics Power Stage 12 6 6.1 6.2 6.3 6.4 6.
Smart High-Side Power Switch 1 BTS4300SGA Overview Basic Features • • • • • • • • • • Fit for 12V application One Channel device Very Low Stand-by Current CMOS Compatible Inputs Electrostatic Discharge Protection (ESD) Optimized Electromagnetic Compatibility Logic ground independent from load ground Very low leakage current from OUT to the load in OFF state Green Product (RoHS compliant) AEC Qualified PG-DSO-8-24 Description The BTS4300SGA is a single channel Smart High-Side Power Switch.
BTS4300SGA Overview Protection Functions • • • • • • • Short circuit protection Overload protection Current limitation Thermal shutdown with restart Overvoltage protection (including load dump) Loss of ground and loss of battery protection Electrostatic discharge protection (ESD) Application • All types of relays, resistive and capacitive loads Data Sheet 4 Rev. 1.
BTS4300SGA Block Diagram 2 Block Diagram VS voltage sensor internal power supply over temperature driver logic IN gate control & charge pump ESD protection T clamp for inductive load over current switch off OUT open load detection ST GND Figure 1 Data Sheet Block diagram.emf Block diagram for the BTS4300SGA 5 Rev. 1.
BTS4300SGA Pin Configuration 3 Pin Configuration 3.1 Pin Assignment GND 1 8 VS IN 2 7 VS OUT 3 6 VS ST 4 5 VS Figure 2 Pin Configuration 3.2 Pin Definitions and Functions Pin Symbol Function 1 GND Ground; Ground connection 2 IN Input channel; Input signal. Activate the channel in case of logic high level 3 OUT Output; Protected High side power output channel 4 ST Diagnostic feedback; of channel. Open drain.
BTS4300SGA Pin Configuration 3.3 Voltage and Current Definition Figure 3 shows all terms used in this data sheet, with associated convention for positive values. IS VS VD S VS IIN IN IL OUT VIN VOU T IST ST V ST GND R GND IGN D Voltage and current convention single avec diag.vsd Figure 3 Data Sheet Voltage and current definition 7 Rev. 1.
BTS4300SGA General Product Characteristics 4 General Product Characteristics 4.1 Absolute Maximum Ratings Absolute Maximum Ratings 1) Tj = 25 °C; (unless otherwise specified) Pos. Parameter Symbol Limit Values Unit Conditions – Min. Max. – 40 V 0 32 V 0 28 V Voltages 4.1.1 4.1.2 4.1.3 VS Reverse polarity Voltage - VS(REV) Supply voltage for short circuit protection Vbat(SC) Supply voltage RECU = 20mΩ, RCable=16mΩ/m, LCable=1µH/m, l = 0 or 5m 2) see Chapter 6 Input pins 4.1.
BTS4300SGA General Product Characteristics 4.2 Pos. Functional Range Parameter Symbol Limit Values Min. Max. Unit Conditions Operating Voltage VSOP 5 34 V VIN = 4.5V, RL = 47Ω, VDS < 0.5V 4.2.2 Undervoltage shutdown 5 V – Undervoltage restart of charge pump VSUV VS(u cp) – 4.2.3 – 5.5 V – 4.2.4 Operating current IGND 1.3 mA VIN = 5V 4.2.5 Standby current IS(OFF) 26 µA Tj = 150°C, VIN = 0V 4.2.
BTS4300SGA Power Stage 5 Power Stage The power stage is built by an N-channel vertical power MOSFET (DMOS) with charge pump. 5.1 Output ON-State Resistance The ON-state resistance RDS(ON) depends on the supply voltage as well as the junction temperature Tj. Figure 4 shows the dependencies for the typical ON-state resistance. The behavior in reverse polarity is described in Chapter 6.3.
BTS4300SGA Power Stage 5.3 Inductive Output Clamp When switching OFF inductive loads with high side switches, the voltage VOUT drops below ground potential, because the inductance intends to continue driving the current. To prevent the destruction of the device due to high voltages, there is a voltage clamp mechanism implemented that keeps the negative output voltage at a certain level (VS-VDS(AZ)). Please refers to Figure 6 and Figure 7 for details.
BTS4300SGA Power Stage Following equation simplifies under the assumption of RL = 0Ω. VS 2 1 E = --- × LI × 1 – ------------------------------------------ 2 V S – V DS ( AZ ) ) The energy, which is converted into heat, is limited by the thermal design of the component. 5.4 Electrical Characteristics Power Stage Electrical Characteristics: Power stage VS = 13.5V, Tj = -40 °C to +150 °C,(unless otherwise specified). Typical values are given at Tj = 25°C Pos. 5.4.
BTS4300SGA Protection Mechanisms 6 Protection Mechanisms The device provides embedded protective functions. Integrated protection functions are designed to prevent the destruction of the IC from fault conditions described in the data sheet. Fault conditions are considered as “outside” normal operating range. Protection functions are designed for neither continuous nor repetitive operation. 6.1 Undervoltage Protection Below VSOP_min, the under voltage mechanism is met.
BTS4300SGA Protection Mechanisms 6.3 Reverse Polarity Protection In case of reverse polarity, the intrinsic body diode causes power dissipation. The current in this intrinsic body diode is limited by the load itself. Additionally, the current into the ground path and the logical pins has to be limited to the maximum current described in Chapter 4.1, sometimes with an external resistor. Figure 9 shows a typical application.
BTS4300SGA Protection Mechanisms IN t IL IL(LIM) IL(SCr) t ST TdST(+) t Current limitation with diag full . vsd Figure 10 Data Sheet Current limitation function of the time 15 Rev. 1.
BTS4300SGA Protection Mechanisms 6.5 Electrical Characteristics Protection Functions Electrical Characteristics: Protection VS = 13.5V, Tj = -40 °C to +150 °C. Typical values are given at Tj = 25°C Pos. Parameter Symbol Limit Values Unit Conditions Min. Typ. Max. -VDS(REV) – 600 – mV TJ = 150°C VS(AZ) 41 – – V Is = 4mA Reverse polarity 6.5.1 Drain source diode voltage during reverse polarity Overvoltage 6.5.2 Over voltage protection Overload condition 6.5.
BTS4300SGA Diagnostic Mechanism 7 Diagnostic Mechanism For diagnosis purpose, the BTS4300SGA provides a status pin. 7.1 ST Pin BTS4300SGA status pin is an open drain, active low circuit. Figure 11 shows the equivalent circuitry. As long as no “hard” failure mode occurs (Short circuit to GND / Over temperature or open load in OFF), the signal is permanently high, and due to a required external pull-up to the logic voltage will exhibit a logic high in the application.
BTS4300SGA Diagnostic Mechanism To reduce the stand-by current of the system, an open load resistor switch SOL is recommended. If the channel is OFF, the output is no longer pulled down by the load and VOUT voltage rises to nearly VS. This is recognized by the device as open load. The voltage threshold is given by VOL(OFF). In that case, the ST signal is switched to a logical low VSTL. Vbat SOL VS IL(OL) R OL OUT OL comp. Ileakage GND V OL( OFF) Rleakage R GND Open Load in OFF .
BTS4300SGA Diagnostic Mechanism 7.2.2 ST Signal in case of Over Temperature In case of over temperature, the junction temperature reaches the thermal shutdown temperature TjSC. In that case, the ST signal is stable and remains to toggling between VST(L) and VST(H). Figure 14 gives a sketch of the situation. IN t V OUT t ST t T JSC ∆T JSC TJ t Diagnostic In Overload full toggling.vs Figure 14 Sense signal in overtemperature condition . Data Sheet 19 Rev. 1.
BTS4300SGA Diagnostic Mechanism 7.3 Electrical Characteristics Diagnostic Functions Electrical Characteristics: Diagnostics VS = 13.5V, Tj = -40 °C to +150 °C, (unless otherwise specified) Typical values are given at Vs = 13.5V, Tj = 25°C Pos. Parameter Symbol Limit Values Unit Conditions Min. Typ. Max. – 3.0 – V VIN = 0V – 5 – µA included in the standby current Load condition threshold for diagnostic 7.3.1 Open Load detection voltage 7.3.
BTS4300SGA Input Pin 8 Input Pin 8.1 Input Circuitry The input circuitry is CMOS compatible. The concept of the Input pin is to react to voltage transition and not to voltage threshold. With the Schmidt trigger, it is impossible to have the device in an un-defined state, if the voltage on the input pin is slowly increasing or decreasing. The output is either OFF or ON but cannot be in an linear or undefined state. The input circuitry is compatible with PWM applications.
BTS4300SGA Application Information 9 Application Information Note: The following information is given as a hint for the implementation of the device only and shall not be regarded as a description or warranty of a certain functionality, condition or quality of the device. VBAT VDD VDD RPUST VBAT_SW R IN Vdd ROL Vs OUT Microcontroller (e.g. XC22xx) IN IN ST OUT RST GND GND R GND Application example single avec diag.
BTS4300SGA Package Outlines 10 Package Outlines 1.27 0.1 0.41 +0.1 -0.05 +0.05 -0.01 0.2 C 0.64 ±0.25 0.2 M A C x8 8 5 Index Marking 1 4 5 -0.21) 8˚ MAX. 4 -0.21) 1.75 MAX. 0.1 MIN. (1.5) 0.33 ±0.08 x 45˚ 6 ±0.2 A Index Marking (Chamfer) 1) Figure 17 Does not include plastic or metal protrusion of 0.15 max.
BTS4300SGA Revision History 11 Revision History Version Date Changes 1.0 2008-03-18 Creation of the data sheet Data Sheet 24 Rev. 1.
Edition 2008-03-18 Published by Infineon Technologies AG 81726 Munich, Germany © 2008 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics.
