●STA801M/802M STA801M/802M 2-Output Separate Excitation Switching Type ■Features • • • • • • • • 2 regulators combined 1 package Compact inline package Output current (0.5A × 2 output) Output voltage of Ch2 selectable from 4 levels. Built-in flywheel diode (Schottky barrier diode) Requires only 7 external components (2 outputs) Phase correction and output voltage adjustment performed internally Built-in reference oscillator (125kHz) - Compact choke coil can be used due to high frequency (compared to existing Sanken product) • Built-in overcurrent and thermal protection circuits • Built-in soft start circuit (Output ON/OFF control) ■Applications • For BS and CS antenna power supplies • For stabilization of the secondary stage of switching power supplies • Electronic equipment ■Lineup Output Voltage (V) Part Number Ch1 Ch2(Select one output) STA801M 5 9.0 / 11.5 / 12.1 / 15.5 STA802M 9 9.1 / 11.7 / 12.1 / 15.7 ■Absolute Maximum Ratings Parameter Symbol Ratings Unit VIN 43 V PD1 6.7(With infinite heatsink) W PD2 1.6(Without heatsink, stand-alone operation) W Junction Temperature Tj +125 °C Storage Temperature Tstg –40 to +125 °C DC Input Voltage Power Dissipation ■Recommended Operating Conditions Parameter Ratings Symbol min. Unit max. DC Input Voltage Range VIN Ch2 VOmax.+2 40 V Output Current Range per Channel IO 0 0.5 A Operating Temperature Range Tjop –20 +125 °C 108 ●STA801M/802M ■Electrical Characteristics (Ta=25°C) Ratings Parameter Ch1 Output voltage 1 STA801M Symbol VO1 max. min. typ. max. 4.80 5.00 5.20 8.64 9.00 9.36 VIN=20V, IO=0.3A η1 Conditions Temperature Coefficient of Output Voltage Line Regulation Load Regulation Output voltage 2-1 30 ∆VOLOAD1 VO2-1 10 Output voltage 2-2 VO2-2 VO2-3 11.04 VO2-4 11.62 Efficiency* 14.88 η Conditions Temperature Coefficient of Output Voltage Line Regulation Load Regulation No-load Circuit Current Switching Frequency Overcurrent Protection Starting Current 8.74 15.50 11.96 11.24 11.70 12.58 11.62 9.46 V 12.16 V 12.10 12.58 V VIN=20V, IO=0.3A 16.12 15.08 15.70 89 VIN=20V, IO=0.3A VIN=20V, IO=0.3A 16.32 40 mV/°C 130 mV VIN=20 to 30V, IO=0.3A 120 VIN=20V, IO=0.1 to 0.4A V % ±2.0 130 VIN=20 to 30V, IO=0.3A 30 mV VIN=20V, IO=0.3A 89 40 ∆VOLOAD 9.10 VIN=20V, IO=0.3A ±2.0 80 VIN=20V, IO=0.3A VIN=20V, IO=0.3A ∆VOLINE Conditions Common 12.10 ∆VO/∆Ta Conditions 20 VIN=20V, IO=0.3A Conditions VO2-4 11.50 mV VIN=20V, IO=0.1 to 0.4A VIN=20V, IO=0.3A Conditions Output voltage 2-4 9.36 mV/°C 110 VIN=14 to 30V, IO=0.3A VIN=20V, IO=0.3A Conditions Output voltage 2-3 9.00 35 40 VIN=20V, IO=0.1 to 0.4A 8.64 % ±1.0 90 VIN=10 to 30V, IO=0.3A Conditions (Select one output) 86 VIN=20V, IO=0.3A ±0.5 Conditions Ch2 80 ∆VOLINE1 V VIN=20V, IO=0.3A VIN=20V, IO=0.3A ∆VO/∆Ta1 Conditions Unit typ. Conditions Efficiency * STA802M min. 30 120 mV VIN=20V, IO=0.1 to 0.4A ICC 15 15 mA f 125 125 kHZ 0.7 A IS1 0.51 0.7 0.51 *Efficiency indicates the value when only one channel is active. The value can be calculated as shown below. 7.5mA is deducted for the no-load Icc circuit current of at unused output. 2 VO•IO η= × 100(%) VIN•(IIN–0.0075) 109 ●STA801M/802M ■Outline Drawing (unit:mm) 9±0.2 b a 3.15±0.5 (1) 4±0.2 2–(R0 (3.1) 1.15 +0.2 –0.1 0.55+0.2 –0.1 1.2±0.1 2–(R1) .65) R-END a. Part Number b. Lot Number 9×P2.54±0.5=22.86±1 q VO2 Cont +0.2 0.55 –0.1 4.3±0.7 (Tip dimension) (Tip dimension) 25.25±0.3 C1.5±0.5 Plastic Mold Package Type Flammability: UL94V-0 Weight: Approx. 2.5g 1 2 3 4 5 6 7 8 9 10 ■Block Diagram VIN 6 4 SW1 P.Reg. OCP SS1 3 + PWM – PWM Logic Drive 2 VOS1 + Amp. – PWM OSC Vref TSD f/4 Reset 4 SW2 OCP PWM Logic SS2 8 10 VOS2 –1 Drive + PWM – VO2 Cont 1 9 VOS2 –2 + Amp. – GND 5 Vref 110 w e r t y u i o !0 VOS1 SS1 SWOUT1 GND VIN SWOUT2 SS2 VOS2–2 VOS2–1 ●STA801M/802M ■Standard External Circuit STA800M 6 VIN + VIN SWOUT1 3 5V:100 µ H 9V:150 µ H Ch 1 SS1 C4 + Open:ON Low :OFF 8 SS2 C5 µ 0.47 F + VO2 Cont 1 GND 5 SWOUT2 Ch 2 GND VO1 C2 + 330µF VOS1 0.47µ F Open:ON Low :OFF L1 4 C1 220µF VOS2 –2 See "Output selection method" for details about connecting VOS2-1 and VOS2-2 of Channel 2. 2 L2 7 150 µ H VO2 + C3 330µF 10 Or VOS2 –1 9 ■Ta-PD Characteristics 7 Power Dissipation PD (W) 6 With Infinite Heatsink 5 4 3 2 Without Heatsink 1 0 –30 0 25 50 75 100 125 Ambient Temperature Ta (°C) 111 ●STA801M/802M ■Selecting External Components 1. Inductors L1 and L2 (1) Suitable for switching regulators Do not use a coil as a noise filter because it generates excess heat. (2) Appropriate inductance A low inductance may cause abnormal oscillation, or cause the overcurrent protection circuit to malfunction in the rated current range. (3) Satisfying the rated current Exceeding the rated current may generate an extremely high current to flow due to magnetic saturation. 2. Capacitors C1, C2, and C3 (1) Satisfy the breakdown voltage and allowable ripple current Exceeding the ratings of these capacitors or using them without derating may shorten their service lives and also cause abnormal oscillation. (2) Low impedance (C2, and C3) A low-impedance model is recommended for C2 and C3 to reduce the ripple voltage and stabilize switching. For stable operation throughout the input voltage range, however, the DC equivalent series resistance (ESR) of C2 and C3 should be 0.1 ohm or less. 3. Capacitors C4 and C5 (1) C4 and C5 are soft-start capacitors. ■Selecting Ch2 Output Voltage When the VO2Cont terminal voltage is set to 0.5V or less, the output voltage changes to the values shown below. To switch the potential at the VO2Cont terminal, drive the open collector of the transistor. No external voltage can be applied to the terminal. Leave the terminal open when not in use because the terminal is already pulled up in the IC. When using terminal no. 9, short it to terminal no. 10. ( ): STA802M 7 STA800M 7 VO2 10 STA800M 9V (9.1V) 10 + 9 1 VO2 Cont VO2 11.5V (11.7V) 1 VO2 Cont 12.1V (12.1V) + 15.5V (15.7V) VO2 output voltage VO2Cont terminal (1 pin) VO2 sensing terminal STA801M STA802M OPEN Low OPEN Low 9pin 9V 12.1V 9.1V 12.1V 10pin 11.5V 15.5V 11.7V 15.7V Low : 0.5V or less ■Soft Start ON/OFF Circuit Terminal nos. 3 and 8 are soft start terminals. Connect a capacitor to the terminal to permit a soft start. Output can be turned on and off by using the soft start terminals. Set the soft start terminal voltage to VSSL (0.15V) or less to stop the output. To switch the potential at the soft start terminals, drive the open collector of the transistor. Since the discharge currents from C4 and C5 flow to the ON/OFF control transistor, limit the current for protection. The SS terminal is pulled up to the power supply in the IC and no external voltage can be applied to the terminal. STA800M 3 or 8 S.S. + C4, C5 Soft start 112 STA800M 3 or 8 S.S. + C4, C5 Soft start +VO ON/OFF ●STA801M/802M ■Typical Characteristics (Ta=25°C) STA801M Load Regulation(Ch1:5V) 0 20 0 0.1 PD Characteristics(Ch1:5V) 0.4 V 0 0 0.5 0.1 0.2 0.3 0.4 20V V 4 2 0 0.5 0 0.2 Output Current IO (A) 0.4 0.6 0.8 100 V Power Dissipation PD (W) 11 N= VI 0V 40 30V V 2 60 40 0.2 0.3 5 0.4 15 5.4 9.4 f 120 0.4 V 0.2 0 =4 VIN 30V V 20 0.1 Output Current IO (A) 5.2 9.2 9V VO ch2 100 0.2 0.3 20 (VIN=20V, IO=0.3A) ch1 ch2 5.6 9.6 140 0.6 0 0 0.5 10 160 V 0.1 0 Temperature Characteristics(Ch1:5V, Ch2:9V) 11 0 0 0.3A Input Voltage VIN (V) 0.8 80 0.5 4 0 1.0 PD Characteristics(Ch2:9V) Efficiency Characteristics(Ch2:9V) 0.4 8 Output Current IO (A) Efficiency η (%) Oscillation Frequency f (kHz) 0 0 Output Voltage VO (V) V =40 V 0 3 20V 7V VIN 0.3 Rise Characteristics(Ch2:9V) 40V 0.4 0.2 12 =7 Output Voltage VO (V) 0.6 0.2 0.1 Output Current IO (A) 6 VIN Power Dissipation PD (W) 0.3 Overcurrent Protection Characteristics(Ch1:5V) 0.8 Efficiency η (%) 0.2 Output Current IO (A) 0.4 0.5 VO ch1 5V 5.0 9.0 η ch2 9V 80 η ch1 5V 0 –40 –20 0 20 40 60 80 100 Output Voltage VO (V) 15 Input Voltage VIN (V) 0A 10 40 A 5 4.9 60 IO= 0 20V 10V 7V 0.5 2 80 VIN=40V 5.0 20 VIN =7 V Output Voltage VO (V) 0.3A 100 Efficiency η (%) A 0.5A 4 0 Efficiency Characteristics(Ch1:5V) 5.1 IO=0 Output Voltage VO (V) 6 40V 30 V Rise Characteristics(Ch1:5V) 4.8 8.8 0 120 0 Ambient Temperature Ta (°C) Output Current IO (A) STA802M PD Characteristics(Ch1:9V) 9.1 Power Dissipation PD (W) Output Voltage VO (V) 30V VIN=40V 9.0 20V 11V 8.9 0.9 0.8 0.8 0.7 0.6 0.5 0.4 V 40 0.3 VIN= V 30 0.2 20V 0.1 0 0 0.1 0.2 0.3 Output Current IO (A) 0.4 0.5 PD Characteristics(Ch2:15.7V) 0.9 Power Dissipation PD (W) Load Regulation(Ch1:9V) 0 0 11V 0.1 0.2 0.3 Output Current IO (A) 0.4 0.5 0.7 0.6 0.5 0.4 0V =4 IN V 0.3 V 30 V 20 0.2 V 7 17. 0.1 0 0 0.1 0.2 0.3 0.4 0.5 Output Current IO (A) 113