GSG 勁力 半導体 Gunter Semiconductor GmbH TFB4014 EDITION 09/00 ISDN Power feeder with 3.3 V logic For inquiry please contact : China Tel: 0086-755-3200442 Fax: 0086-755-3355520 Hong Kong Tel : 00852-26190748 Fax: 00852-24948080 e-mail [email protected] Preliminary Technical Data MEGAXESS TFB4014T Edition 09/00 ISDN Power Feeder with 3.3V Logic Short Description Features The integrated circuit TFB4014T with 3.3V logic interface is designed for feeding two and four wire ISDN transmission lines. The TFB4014T feeds transmission lines up to 150mA per each output. The integrated circuit is fabricated in 60V MIX technology (BCD-MOS). DMOS power transistors with current limitation, overtemperature and short current protection are used for driving the lines. • Power supply for up to four transmission lines • Overload protection for each output • Separate control for each output • Maximum programmable output current limit 150mA per line • 3.3V logic interface • Status detection for each line output • SOP 28 Block Diagram L1 S1 L2 S2 L3 S3 L4 S4 C1 C2 C3 S1 Overload Protection Control Logic C4 S2 S3 S4 CS Reset Thermal Protection CPRG VCC VBATT GND Pinning Pin Symbol Function 1 VCC 2 CPGR 3 C2 Control input switch 2, pull down 4 S2 Output status detection switch 2, pull up 5 L2 Feeding output switch 2 6 VBATT Negative supply voltage 7 VBATT Negative supply voltage 8 VBATT Negative supply voltage 9 VBATT Negative supply voltage 10 L3 Feeding output switch 3 11 S3 Output status detection switch 3, pull up 12 C3 Control input switch 3, pull down 13 n.c. - 14 CS Input chip select, pull up 15 RST Reset input, pull up 16 n.c. - 17 C4 Control input switch 4, pull down 18 S4 Output status detection switch 4, pull up 19 L4 Feeding output switch 4 20 VBATT Negative supply voltage 21 VBATT Negative supply voltage 22 VBATT Negative supply voltage 23 VBATT Negative supply voltage 24 L1 Feeding output switch 1 25 S1 Output status detection switch 1, pull up 26 C1 Control input switch 1, pull down 27 TP Test pin, don’t connect 28 GND Positive supply voltage Current limit, programmable by external resistor Ground Functional Description The TFB4014T is designed to feed the S0 and Up0 lines in digital exchanges. The IC includes four feeding output stages. Each output is able to deliver a nominal output current in the range from 50mA to 150mA. The output current limit is programmable by an external resistor connected to ground. The resistor value is calculated by: RCPRG = ( 2 * 1.25V / IOmax ) * 1000 The current limitation response time is about 100 millisecond. This delay avoids a failure detection caused by current peaks when the line outputs turn-on. All outputs are protected against overload and overtemperature. The TFB4014T also contains a parallel logic interface to control each output stage separately. The status outputs are open collector outputs with internal 15kΩ pull-up resistors. 09/99 TFB4014T 2 Functional Description (cont.) In normal operation the feeding switches Ln are ON and the feeding current is lower than the programmed current limit. The temperature protection is not active. The status outputs Sn are LOW. The status outputs change to HIGH if one ore more of the following conditions are valid: a) Feeding switches Ln are OFF controlled by Cn. b) RESET condition (external or internal). c) Feeding switches are ON controlled by Cn, but the feeding current exceeds the programmed current limit. d) The temperature protection is active. The temperature protection has two trip points with hysteresis. When the junction temperature reaches 145°C and output currents are higher than the programmed limit the respective outputs are switched-off. These outputs can be switched-on with a new HIGH signal at Cn after the temperature degreased. When the temperature exceeds 155°C a RESET signal is generated internally. All outputs Ln are forced to switch-off. The outputs can be switched-on only with a new HIGH signal at Cn when the temperature dropped down. All feeding outputs are forced to switch-off independent of the control input status, if the Reset input RST is LOW. Therefore the power transistors can not switch-on when the supply voltage ramps up. When the supply voltage raised to normal level it is possible to switch-on the outputs Ln setting the control inputs Cn to HIGH step by step, while CS = RST = HIGH. Function Table Feeding Status Output Ln Output Sn Control Input Cn RST CS Feeding output ON, normal mode H H H ON L Feeding output OFF, normal mode L H H OFF H RESET x L x OFF H Output current exceeds limit H H H ON H Overtemperature H H H OFF H Function Turn-on Order t1 t2 t3 t4 t5 t6 t7 t8 t9 L1 - L4 OFF L1 ON L2 ON L3 ON L4 ON VBATT ON ON ON ON ON ON ON ON ON RST x L L H H H H H H VCC x x ON ON ON ON ON ON ON CS x x x x H H H H H C1 x x x x L H H H H C2 x x x x L L H H H C3 x x x x L L L H H C4 x x x x L L L L L X = irrelevant 09/99 TFB4014T 3 Absolute Maximum Ratings Absolute maximum ratings are limiting values, which can cause damage of the device with exceeding only one parameter. Absolute maximum values are valid for the operational temperature range. Parameter Symbol Min. Max. Unit Positive Supply Voltage VCC -0.3 4.3 V Negative Supply Voltage VBATT -64 +0.3 V Input Voltage (Cn, CS, RST) VI -0.5 VCC + 0.5 V Output Voltage (Sn) VO -0.5 4.05 V Output Current (Sn) IO 15 mA Junction Temperature Tj +155 °C Storage Temperature TSTG -40 +125 °C Ambient Temperature TA -15 +85 °C Thermal Resistance junction-ambient Rthja 65 Power Dissipation Ptot ESD Voltage (1.5k, 100pF) Pin 3, 12, 17, 26 Pin 14, 15 other pins K/W 1 W V VESD -2000 -2000 -2000 +200 +1500 +2000 Symbol Min. Max. Unit Negative Supply Voltage VBATT -53 -36 V Positive Supply Voltage VCC 3.0 3.6 V Input LOW Voltage (Cn, CS, RST) VIL 0 0.8 V Input HIGH Voltage (Cn, CS, RST) VIH 2.0 VCC V Operating Temperature TA 0 +70 °C Recommended Operating Conditions Parameter Electrical Characteristics VBATT = -53V, VCC = 3.6V, RCPGR = 16kΩ, TA = 0°C to +70°C, if not otherwise specified Parameter Positive Supply Current all outputs Ln ON, ILn= 100mA Negative Supply Current all outputs Ln OFF, VBATT = -64V Symbol Min. ICC Max. Unit 7 mA IBATT -2.5 mA Input HIGH Voltage (Cn, CS, RST) VIH 2.0 V Input LOW Voltage (Cn, CS, RST) VIL 09/99 TFB4014T 0.8 V 4 Electrical Characteristics (cont.) VBATT = -53V, VCC = 3.6V, RCPGR = 16kΩ, TA = 0°C to +70°C, if not otherwise specified Parameter Symbol Input HIGH Current (Cn, CS, RST) VIN = 2.0V IIH Input LOW Current (CS, RST) VIN = 0.8V IIL Min. Max. Unit 200 µA -200 Output LOW Voltage (Sn) IOL = 3mA VOL Output HIGH Voltage (Sn) VOH Output OFF Current (Ln) VLn = 0 V IOFF µA 0.4 3.1 V V 100 µA Package SOP 28 HE E Q c A1 A A2 D Z e e Z bp Symbol 09/99 TFB4014T 0,15 Lp 0,25 M Dimensions in mm min nom max A - - 2.65 A1 0.1 - 0.3 A2 2.25 - 2.4 bp 0.35 - - bp - - 0.49 c 0.23 - 0.32 D 17.9 - 18.1 E 7.4 - 7.6 e - 1.27 - HE 10.2 - - HE - - 10.6 Lp 0.3 - - Z - - 0.82 Θ 0° - 10° n - 28 - 5