l9610 STMicroelectronics, l9610 Datasheet
l9610
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l9610 Summary of contents
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... Load dump protection ■ Load power limitation ■ External PowerMOS protection ■ Limited output voltage slew rate Description The L9610C is a monolithic integrated circuit working in PWM mode as controller of an external PowerMOS transistor in high side driver configuration. Table 1. Device summary Order code L9610C ...
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... Ground compatible triangle oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.3 Timer and protection latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4.4 Under and overvoltage sense with load dump protection . . . . . . . . . . . . . 7 4.5 Short circuit current regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.6 Bandgap voltage reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.7 Charge pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.1 Controlling a 120 W halogen lamp with the L9610C dimmer . . . . . . . . . . 11 6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2/15 L9610 ...
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... L9610 1 Block diagram Figure 1. Block diagram 3/15 ...
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... The capacitor connected between this pin and the source of the PowerMOS 14 BS allows to bootstrap the gate driving voltage. 16 Out G Output for driving the gate of the external PowerMOS. 4/15 Functions . R > are reduced : this allows to transfer a costant power to the o . L9610 defines the gate G the duty cycle and the ...
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... L9610 3 Electrical specification 3.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol V Max. supply voltage S Transient peak supply voltage (R Load dump ≤ t ≤ 10 ms; τ rise Field decay ≤ t ≤ τ r fall Low energy spike: t rise I Max. supply current (t < 300 ms) ...
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... prot T T 6/15 < unless otherwise specified) s Test conditions (1) (2) ( =100 µA G without MON = 2.5 mA L9610 Min. Typ. Max. Unit 800 2500 nF nFV/ms 0.12 0.44 ms/nF 80 100 120 1 µA 0 µA 0.5 V/µ ...
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... L9610 4 Functional description 4.1 Pulse width comparator A ground compatible comparator generates the PWM signal which controls the gate of the external PowerMOS. The slopes of the leading and trailing edges of the gate driving signal are defined by the external capacitor C This feature allows to optimize the switching speed for the power and RFI performance best suited for the application ...
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... In this condition the gate of the PowerMOS is held at the GND pin potential and thus the load voltage is : Figure 3. Typical transfer curve Figure 4. The typical waveforms for the power limitation function 8/15 . The maximum pulse supply current (see 0.3R DUMP – – CLAMP GS L9610 ...
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... L9610 4.5 Short circuit current regulation The maximum load current in the short circuit condition can be chosen by the value of the current sensing resistor R Two identical V compatible comparators are provided to realize the short circuit protection. S After reaching the lower threshold voltage (typical value V enables the timer and the gate is driven with the full continuous pump voltage : when the upper threshold voltage value is reached the second comparator maintains the chosen I driving the NMOS gate in continuous mode ...
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... Figure 5. Typical waveforms for short circuit current condition. 10/15 L9610 ...
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... BS BS 5.1 Controlling a 120 W halogen lamp with the L9610C dimmer The L9610C lamp dimmer is used to control the brightness of vehicle headlamps using H4 type lamps (see Figure lamps: closing the switch possible to reduce the average lamp voltage as desired: If pin 5 is connected to ground the average lamp voltage is constant, even for supply voltages in excess ...
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... The recommended value for C 12/15 and timing capacitor C should be dimensioned according ------------------------------------------------------ - 2Inom @V S × 2 limitation time = ------------------------------------------------- maximum brightness) the voltage drop across the sense 3.5 V) must be chosen so that the delay before intervention pF 14V nom L9610 . ...
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... L9610 6 Package information In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ECOPACK trademark. Figure 8. SO16 narrow mechanical data and package dimensions DIM ...
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... Revision history Table 6. Document revision history Date 09-Oct-2000 18-Feb-2009 14/15 Revision 1 Initial release. Document reformatted. 2 Added Table 1: Device summary on page Updated Section 6: Package information on page L9610 Changes 1. 13. ...
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... L9610 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...