ha17384hps Renesas Electronics Corporation., ha17384hps Datasheet
ha17384hps
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ha17384hps Summary of contents
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... HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP High Speed Current Mode PWM Control IC for Switching Power Supply Description The HA17384S/H and HA17385H are PWM control switching regulator IC series suitable for highspeed, current-mode switching power supplies. With ICs from this series and a few external parts, a small, low cost flyback-transformer switching power supply can be constructed, which facilitates good line regulation by current mode control ...
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Functions • Under-voltage lockout system • Reference voltage regulator of 5.0 V ± 2% • Triangular wave (sawtooth) oscillator • Error amplifier • Totem pole output driver circuit (direct driving for power MOS FETs) • Current-detection comparator circuit for current ...
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... Product Lineup Package DILP8 (DP-8B) SOP8 (FP-8DC) HA17384SPS HA17384SRP HA17384HPS HA17384HRP HA17385HPS HA17385HRP Pin Arrangement Pin Function Pin No. Symbol 1 COMP Error amplifier output pin 2 FB Inverting input of error amp./OVP input pin 3 CS Current sensing signal input pin Timing resistance, timing capacitance connect pin ...
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Block Diagram COMP (OVP input) 7. RT/CT 4 8.4 mA Note: 1. Blocks with bold line are not included in HA17384SPS/SRP. Rev.3.00 Jun 15, 2005 page 0.8mA UVL1 H L − ...
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... Operating temperature Junction temperature Storage temperature Notes: 1. For the HA17384HPS and HA17385HPS, This value applies 43°C; at temperatures above this, 8.3 mW/°C derating should be applied. For the HA17384SPS, This value applies 68°C; at temperatures above this, 8.3 mW/°C derating should be applied. ...
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... Applies to the HA17384HPS/HRP and HA17385HPS/HRP. 4. Applies to the HA17384SPS/SRP. Rev.3.00 Jun 15, 2005 page 43°C 63°C 68°C 89° 100 Ambient Temperature Ta (°C) HA17384SRP : −11.1 mW/°C (wiring density is 30%) : − ...
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Electrical Characteristics (The condition is 25°C, V • Reference Part Item Symbol Reference output voltage Vref Line regulation Regline Load regulation Regload Output short current los ∆Vref Temperature stability Output noise voltage V N Note: 1. Reference value ...
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Electrical Characteristics (cont.) (The condition is 25°C, V • Current Sensing Part Item Symbol Voltage gain A VCS Maximum sensing voltage Vth CS PSRR Power supply voltage rejection ratio Input bias current I BCS Current sensing tpd response ...
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Electrical Characteristics (cont.) (The condition is 25°C, V • UVL Part Item Symbol Threshold voltage for V TH UVL high V level IN Threshold voltage for V TL UVL low V level IN V UVL hysteresis voltage V ...
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Timing Chart Signal Name Power ON Input voltage V Pin UVL1 Internal signal which 0V cannot be externally monitored. Reference voltage 0V Vref Pin 8 UVL2 Internal signal which 0V cannot be externally monitored. Oscillation voltage of ...
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Operation (Description of Timing Chart) From Power ON to Turn On After the power is switched ON, the power supply terminal voltage (V resistor this time, when the power voltage is in the range ...
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Power OFF At power OFF, the input voltage of the transformer gradually decreases and then V the input voltage. When V becomes lower than again and the PWM pulse stops. Note: 2. The value is for the ...
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CS terminal Figure 3 Operation Diagram of Current Sensing Part Point maximum rated load, the setting should be made to give approximately 90% of area A below. 2) When the OVP latch is operated, the setting should be ...
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Features and Theory of Current Mode Control Features of Current Mode Control • Switch element current detection is performed every cycle, giving a high feedback response speed. • Operation with a constant transformer winding current gives a highly stable output ...
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A. Control in the case of heavy load B. Control in the case of light load As the load becomes heavy and the DC output decreases, the current sensing level is raised as shown in A. above in order to ...
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Main Characteristics Supply Current vs. Supply Voltage (HA17384S/ 25°C C fosc = 52kHz Latch current 5 (HA17384H Power supply voltage V Standby Current/Latch Current vs. Supply Voltage Exploded diagram of ...
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UVL Threshold Voltage vs. Ambient Temperature 20 HA17384S − Ambient temperature Ta (°C) Load Regulation Characteristics of Reference Voltage 6 25° 15V IN 5.5 5.0 Vref ...
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Figure 7 scillation Frequency vs. Timing Resistance Case 1. Setting large maximum duty cycle. Case 2. Setting small maximum duty cycle. Figure 8 Relationship Between Triangular Wave and Maximum ON Duty of PWM Pulse Rev.3.00 Jun 15, ...
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Note: In the oscillation system of this IC, a constant discharging current of 8.4mA flows the timing capacitor during triangular wave fall. Therefore, note that a small maximum ON duty (large dead band) leads ...
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Oscillation Frequency vs. Ambient Temperature 15V 1000pF Dumax = 95% 50 Dumax = 40 − Ambient Temperature Ta (°C) Rise/Fall Time of Output Pulse vs. Load ...
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V = 15V 25° −25 10 Figure 10 Open Loop Gain Characterisrics of Error Amplifier Rev.3.00 Jun 15, 2005 page Gain A VO Phase Φ Phase margin at f ...
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Calculation of operation parameters 1. Maximum ON duty Du max (Refer to the right figure.) Du max = 1 + 1.78 × Oscillation frequency fosc fosc = { × R × From ...
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Application Circuit Example (1) Commercial AC 100V 10k 2SA1029 150k 10k R T 47k 10k HA17431 C T The circuit for 3300p output current limiter Notes PRIMARY GND, 2. Check the wiring direction of the transformer coil. 3. ...
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Application Circuit Example (2) When the error amplifier is used Commercial AC 100V Line filter 2SA1029 10k 10k 47k HA17431 The circuit for output current limiter 150k 100p R T 10k C T 3300p 470p When the error amplifier is ...
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Application Examples for Fuller Exploitation of Power Supply Functions A number of application examples are briefly described below. 1. Soft start A soft start is a start method in which the PWM pulse width is gradually increased when the power ...
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Notice for Use OVP Latch Block • Case When DC power is applied directly as the power supply of the HA17384H, HA17385H, without using the transformer backup coil. Also, when high-frequency noise is superimposed on the V • Problem The ...
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Input Externally Synchronized Operation • Case When, with a power supply using the HA17384S/H or HA17385H, externally synchronized operation is performed by applying an external syncronous signal to the R • Problem Synchronized operation may not be possible if the ...
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Package Dimensions JEITA Package Code RENESAS Code P-DIP8-6.3x9.6-2.54 PRDP0008AF 0. JEITA Package Code RENESAS Code P-SOP8-3.95x4.9-1.27 PRSP0008DD Index mark Rev.3.00 Jun 15, 2005 page 28 of ...
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Keep safety first in your circuit designs! 1. Renesas Technology Corp. puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead ...