CS35L32 datasheet(7/51 Pages) CIRRUS

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DS963F5

CS35L32

2 Typical Connection Diagram

Figure 2-1. Typical Connection Diagram

Battery

H

COUT

0.1



0.1

F

LBST

44.2 k



RBST_SNS



COUT

Applications

Processor

0.1

F

CBST

RP_I

PMU

F

0.1

F

4.7

F *

Line Input 1

CS35L32

ISENSE–/

VSENSE+

SPKOUT+

ISENSE+

IREF+

SPKOUT–/

VSENSE–

VBST

GNDP

FLOUT1

FLOUT2 / AD0

GNDPLED

SPKRSUPPLY

SDOUT

LRCK

SCLK

MCLK

FLEN

FLINH

SCL

SDA

INT

RESET

FILT+

GNDA

IN+

IN–

3.0–5.25 V

1.71–1.89 V

F

Notes:

• All external passive component values are nominal values.

Key for capacitor types required:

* Use low ESR, X7R/X5R capacitors.

** Use low ESR, X7R capacitors.

If no type symbol is shown next to a capacitor, any type may be used.

• As required, add protection circuitry to ensure compliance with the absolute maximum ratings in Table 3-2.

1. CBST is a ceramic capacitor and derates at DC voltages higher than 0 V. In this application, the capacitor should not derate to a value lower

than 4

F across the specified boost output voltage in Table 3-4. Capacitor tolerance and the temperature coefficient should also be taken

into account to guarantee the 4-

F value.

2. Minimum pull-up resistor values are selected in accordance with the Table 3-8 VOL specification. Maximum pull-up resistances are selected

based on load capacitance and relevant switching specs (Table 3-13).

3. Select each capacitor to be 0.22

F for an 18-Hz passband @ 12-dB amplifier gain, for a 3-dB roll-off. The equation for calculating the

capacitance for a given passband is C = 1/(

 * f * RINDIF), where C is in F, RINDIF is the differential input resistance in and f is in Hz (see

the differential input resistance specification in Table 3-3). Signals IN+ and IN– are subject to the recommended ranges in Table 3-1.

4. RBST_SNS is inherently tied to the accuracy of the BST_IPK current limit. A resistor with a 0.1% tolerance is required for this component to

meet the specified IMAX(B) max and min values in Table 3-4.

5. The required tolerance on the 0.1-

 ISENSE resistor is 1%. The required temperature coefficient is ±200 ppm/°C.

6. COUT capacitors are optional EMI suppressors used with CS35L32 edge-rate control, depending on application requirements. Because

switching losses increase linearly with increases to these capacitances, it is recommended that COUT values not exceed 2 nF. The

recommended value is 470 pF.

7. LED and I2C addressing options:

VBST

c) AD0 = 1

d) AD0 = 0

b) AD0 = 1

a) AD0 = 1

VBST

FLOUT1 FLOUT2

See Note 7 for LED

and I2C addressing

options.

Note 1

Note 3

Note 2

Note 5

Note 4

Note 6

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