SPF5018

High-side Power Switch ICs [Surface-mount, current monitor output function] SPF5018 Features ● Internal current sense resistor ● High accuracy current monitor output (sample & hold function) ● Built-in overcurrent and thermal protection circuits External Dimensions (unit: mm) 12.2±0.2 10.5±0.2 16 9 1.0 –0.05 Fin thickness +0.1 Absolute Maximum Ratings Parameter Power supply voltage 1 Power supply voltage 2 Power supply voltage 3 Current sensing voltage Output terminal voltage Input terminal voltage Output current Power dissipation Storage temperature Channel temperature Symbol VB Vcc VB Vsense+ Vsense– VOUT VPWM VHold IOUT PD Tstg Tch Ratings 0 to 32 –0.5 to 7.0 0 to 40 –0.8 to 6 Vsense+±Io • Rsense –2 to 32 –0.5 to 7.0 2.0 2.0 –40 to +150 150 Unit V V V V V V A W °C °C Conditions 1 1.27±0.25 VB terminal, t = 1 min 8 2.5±0.2 0.4 –0.05 +0.15 +0.15 0.25–0.05 Block Diagram (for one channel) Depends on surface-mount board pattern Vcc 2 11 clamp OSC Charge Pump TSD OCP Sense MOS D S Electrical Characteristics Parameter Min. operating power supply voltage Operating power supply voltage 1 Operating power supply voltage 2 Quiescent circuit current 1 Quiescent circuit current 2 PWM terminal input voltage PWM terminal input current Hold terminal input voltage Hold terminal input current Output ON resistance OUT 14 Sense+ (VB=14V, Ta=25ºC unless otherwise specified) PWM 3 70kΩ Symbol VB min VB VCC Iqvb Iqvcc VPWMH VPWML IPWMH VHoldH VHoldL IHoldH RDSon Ratings min 6 10 14 5.0 7.2 0.2 3.5 16 typ max Unit V V V mA mA V Conditions Minimum operation of OUT terminal. CMOS Logic 13 lamp + – Sense R Hold 4 70kΩ 15 Sense– *1 *2 Vcc = 5V, VPWM = 0V Vcc = 5V, VPWM = 0V Vcc = 5V Vcc = 5V, VPWM = 5V, Active H Vcc = 5V Vcc = 5V, VPWM = 5V, Active H * 3 IOUT = 1A IOUT = 1A, Ta = 125°C IOUT = 1A IOUT = 1A, Ta = 125°C S/H 6 S/H 5 7 C LG 1.5 70 3.5 V 1.5 70 110 0.14 0.21 0.21 µA Ω Ω Ω Ω A °C 1.2 0.2 A V V V V mA mA 15 15 100 50 500 650 1 2 70 µs µs µs µs µs µs µs µs µs Io = 0.5A, Vcc = 5V, C1 = 0.033µF VB = 11V, Vcc = 5V, Io = 1.2A, C1 = 0.033 µF VB = 11V, Vcc = 5V, Io = 1.2A, C1 = 0.033µF, Ta = 125°C Io = 0.5A, Vcc = 5V 110 µA Standard Connection Diagram *3 2 VCC 11 VB Controlling microcomputer CPU 3 4 1kΩ 0.01 µF PWM Hold S/H SFP5018 OUT Sense+ Sense– 14 13 15 D1 6 5.1 kΩ Current sensing resistance Overcurrent protection starting current Thermal shutdown operating temperature Operation circuit for current monitor output Rsense 0.25 Is Ttsd Io 3.0 150 0.2 C 5 C1 LG 7 D2 *4 *1 Io = 0A, Vcc = 5V Io = 0.2A, Vcc = 5V Io = 0.5A, Vcc = 5V, Ta = –40 to 140°C Io = 1.2A, Vcc = 5V, Ta = –40 to 140°C Io = 1A, Vcc = 5V, VSH = 0V Io = 1A, Vcc = 5V, VSH = 5V VPWM * Use a Schottky Di for D2 when the Sense+ terminal is lower than the abs. max. rated voltage (–0.8V) Current monitor output voltage VSH 0.488 1.219 2.925 0.500 1.250 3.000 0.512 1.281 3.075 5 Timing Chart Ordinary operation (auto hold) Thermal protection Ordinary operation (external hold) Overcurrent protection Ordinary operation (auto hold) Current monitor output current ISH –6 t on t off Output transfer time Output rise time Output fall time Current monitor output hold time Current monitor output delay time Hold time after inputting hold Vout tr tf t sh t shd t shh Icoil VS/H *1 500 to 650 usec *1 500 to 650 usec *2 VHold Truth table VPWM VOUT L L H H S/H settling time t stt 80 Note: * 1: Accuracy warranty range for current monitor output * 2: Equivalent errors are not included in current monitor output accuracy. * 3: With built-in pull-down resistance (70kΩ typ) * 4: Self-excitation and oscillation type * 5: Accuracy of current monitor output is affected by the materials of the hold capacitor (C1). The capacitor C1 must be of low dielectric absorption and have good bias and leak current characteristics. 48 2.0 –0.8 VB +0.2 (Ta=25ºC) 7.5±0.2