1.0 F

DCP

02

COM

1.0 F

1.0 F

DCP

02

SYNC

1.0 F

DCP

02

SYNC

+

DCP020503, DCP020505, DCP020507, DCP020509, DCP020515D, DCP021205

DCP021212, DCP021212D, DCP021515, DCP022405, DCP022405D, DCP022415D

www.ti.com

SBVS011L – MARCH 2000 – REVISED MAY 2015

8.4 Device Functional Modes

8.4.1 Disable/Enable (SYNC pin)

Any of the DCP02 series devices can be disabled or enabled by driving the SYNC pin using an open drain

CMOS gate. If the SYNC pin is pulled low, the DCP02 becomes disabled. The disable time depends upon the

external loading. The internal disable function is implemented in 2

μs. Removal of the pull down causes the

DCP02 to be enabled.

Capacitive loading on the SYNC pin should be minimized (

≤ 3 pF) in order to prevent a reduction in the oscillator

frequency. The application report External Synchronization of the DCP01/02 Series of DC/DC Converters

(SBAA035) describes disable/enable control circuitry.

8.4.2 Decoupling

8.4.2.1 Ripple Reduction

The high switching frequency of 400 kHz allows simple filtering. To reduce ripple, it is recommended that a

minimum of 1-

COM pin. A 2.2-

μF capacitor on the input is also recommended.

8.4.2.2 Connecting the DCP02 in Series

Multiple DCP02 isolated 2W DC/DC converters can be connected in series to provide non-standard voltage rails.

This configuration is possible by using the floating outputs provided by the galvanic isolation of the DCP02.

the self-synchronization feature of the DCP02 prevents beat frequencies on the voltage rails. The SYNC feature

of the DCP02 allows easy series connection without external filtering, thus minimizing cost.

as shown in Figure 10. For example, connect a dual-output, 15-V, DCP022415D device to provide a 30-V rail.

All 5-V, 12-V, and 15-V input voltage designs require a2.2-

μF, low-ESR ceramic input capacitor, while 24-V input

applications require only 0.47

μF of input capacitance.

Figure 9. Multiple DCP02 Devices Connected in Series

Figure 10. Dual Output Devices Connected in Series

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Product Folder Links: DCP020503 DCP020505 DCP020507 DCP020509 DCP020515D DCP021205 DCP021212

DCP021212D DCP021515 DCP022405 DCP022405D DCP022415D